The purchase of this specific phone was made in early December 2019 for €210. It took me almost 5 years to make the replacement (to Google Pixel 7 Pro) because there was really almost nothing it was missing for daily (demanding) use.

Negatives:
Poor video quality for standards in 2022 and beyond
Bad performance and some lags in a few apps (but it's acceptable)

Positives:
...
The 5-year-old battery still somewhat lasts the day.
The photos are good enough to remember your experiences.
Specifically, the selfies are still top-notch.
(Obviously) It has an sd card slot so I never had an issue with just 64 gb.
VERY NICE screen in terms of colors, etc., with enough brightness.
18w charging isn't the fastest thing but it's on par with the 2019 iPhones...
And so on.

BUT THE MOST IMPORTANT THING, which kept it in my pocket for 5 years, is that it has crazy editing capabilities.
Somehow, this cheap little device is still supported on the latest lineageos and gets updates every 2 weeks...
Xiaomi abandoned it on android 12, but it has already reached 14 and slowly roms for 15 are coming out...
(For those interested, join the community at t.me/PyxisVelaChannel)

For now, its use is over... FROM ME! I gave it to a relative who broke a much better phone, and they have almost no complaints!

If you have the opportunity to upgrade, I would say it's about time - but with the roms that keep coming out, it does its job just fine!

I bought the phone in March 2020, coming from Huawei Honor 6x. The version is 6GB/128GB, Aurora Blue and I bought it for 253E. Amazing phone with a beautiful color (perfect iridescent color) and design. Very fast with browsing, social media, games, and overall multitasking, excellent screen with clear and bright colors, always on display function, and several options for notifications/messages, etc. Good photos in the morning, videos are quite average, zoom significantly affects the quality of the photos. Among the positives is the flash of the front camera that produces clear selfies, unlike the flash of the main camera that ruins the photos at night. Nice camera features in general (night mode, portrait, wide, slow motion, short video, etc). Satisfactory speaker, good battery life (although after 2.5 years it has started to drain excessively fast - even though I constantly have location, data, Wi-Fi, and Bluetooth on), it hasn't suffered any damage from falls (I have changed many screen protectors and always use a case). Also, the NFC is a positive feature that I now use everywhere, and fast charging. It has several functions such as DND, sleep mode, one-handed mode, which make daily life easier, on-screen fingerprint (which sometimes doesn't work and I have to use the passcode) and face ID.

In the last 6 months, it has been acting up with the keyboard, where it feels like the menu has dropped down and it doesn't register the typing. Either it goes away with a simple lock and leaving it aside for a while or a restart. After a certain point, it becomes annoying.

Overall, it's a wonderful phone and exceptionally good for the money I paid at that time. It has lasted me until now (in excellent condition), but I will upgrade it in 2023.

It is my hand's extension for 6 months now and I can say it's worth every last euro. I got it for 258€. I haven't found anything negative yet. Its strong point is the AMOLED screen with absolute black, which is why I noticed it before buying it. Its multitasking never lags, even if I have around 20 forgotten apps in the RAM. Its camera is beyond my expectations, many times I tease my girlfriend who spent triple the money on the iPhone 8 and end up taking pictures of her with this phone because it has a better texture, colors, and depth of field. In gaming, it handles demanding games like COD and PES easily on ultra settings. In terms of appearance, it is impressive, although it will necessarily be hidden by the case, at least get one with a notch to show the LED logo in notifications and music. The battery lasts a full day for now. Also, I have found the program that turns it into a remote control for any device, from TV to air conditioning, fans, TV box, and stereo, using infrared, very convenient. It even controls a 20-year-old air conditioner. The only negative thing I noticed after the latest update is that the music app has added advertisements in banners between the songs in the playlist, and there is also targeted advertising now, to the point where it seems like they are recording words from private conversations through the microphone and Google recognizes them, throwing the corresponding advertisement at you before you even type the product.

Someone must be crazy to buy it at today's incredibly high price of around 290-295€, while just 4 months ago it was 225€! Stay away and wait for the inflated price to drop. Wait so you don't cry over the money you spent. The phone is not worth anything more than 200€. And let me explain:
a) It has one of the highest SAR/head values. This is probably due to the internal antenna design. You can feel the "heat" on your head within the first minute! The unacceptably high radiation emission makes it a prohibitive purchase for me as a primary device. Especially for professionals who talk frequently.
b) The notification LED is in the wrong position, making it unnoticed unless you are present when it lights up. And this is a serious issue for a professional.
c) Problematic fingerprint unlocking. I don't know if it's due to the software or the construction. It doesn't recognize the fingerprint immediately and easily.
On foreign websites (almost all of them), its price is 70-80€ lower. Here, at 290€, it is clearly not considered value for money with these specific flaws it has.

----------Positive:----------

*The screen is very good, it's amoled. I have compared many times with friends how a photo looks on this phone and how it looks on others, and they always say how beautifully the colors are represented on the screen and how much nicer the photos look on this phone. The blacks are amazing (amoled quality) and they are impressive. It has a large screen and may be uncomfortable for small hands (I have accidentally pressed things many times due to its size and small bezels).

*The camera is very good, especially for this price range. It has very good resolution, great bokeh effect, and amazing night mode. I have compared night photography with much more expensive phones and the results have always been that I take much better night shots with this phone. The selfie camera is also very good with many features. Overall, it has one of the best cameras for this price range.

*Performance: I am a demanding user, usually having many windows open and playing all demanding games available on Android. I use the phone almost all day with heavy usage. It has never lagged (I have owned the phone for about half a year), it runs very fast, instantly opens all windows and multitasks smoothly. I play all games on ultra settings without any lag and with excellent performance.

*Calls: Everyone can hear me clearly, even if I whisper, while they cannot hear the noise around me at all (I have talked in a very noisy place and the person I was talking to could only hear me and not the noise around me).

*The speaker is average. It's fine if you want to listen to your music or watch a video on YouTube. However, for movies, etc., I prefer to use headphones to have better sound quality and enjoy it more. It is just a decent speaker like all others in this category and it does its job without anything extraordinary.

*The build quality is very good and sturdy. The sides of the device are metallic and not fake plastic. The back is glass and if you get the blue one, it is really beautiful as it creates designs that follow the movement of your hand. The screen has gorilla glass protection, so it won't easily break. It gives you a pleasant feeling when holding the device and you immediately notice its quality when you hold it and then another phone.

*The battery is amazing. You can easily get two days of usage. With heavy usage, you can get through a day without any problems. It charges very quickly and generally, even on the second day without charging, it still has enough battery for the average user.
I have tried playing demanding games literally all day non-stop and okay, in that case, you will need to charge it during the day. This is absolutely reasonable for all phones.

----------Negative:----------

*The fingerprint sensor is not that good. There are many times when it took 2 or 3 attempts to unlock. Generally, it unlocks on the first try, but you will often need to try a second or third time, maybe even a fourth, depending on the condition of your fingers (e.g. wet, etc.). It is preferable to have clean hands, otherwise, it will not be easy to unlock.

*Drops: Although it is a sturdy device, the fact that the sides are metallic makes it very easy to create small marks when the phone falls. Specifically, it has happened to me 3 times without a case, the first time it fell on a marble surface and the other two times on the floor, and each time it left small marks on the corners. I don't mean that it broke or anything like that. We said it's a sturdy device, nothing broke, no cracks, no scratches, no distortion, just small marks on the metal surface (which don't go away). And combined with the fact that the back is glass, it leaves fingerprints and slips a little, and overall it's not ideal for the glass surface to fall somewhere, so using a case is necessary in most cases. So definitely put on a case.

*MUI. It is known that almost all Xiaomi phones have the MIUI, but while I used to like it before, now it has started to deteriorate. I put it in the negatives because although it has many positive points, there are some things that bother me and could have been improved. Of course, this depends on each person's taste and preferences, but objectively there are some minor issues like bugs that they try to fix with each update. This, of course, is a bit subjective, but I prefer other functionalities more

Owner of the device for about 7 months, this is the best device implementation that has passed through my hands in the past 10 years.
Rich colors from its amazing amoled screen, truly vibrant and not oversaturated like in Samsung, very responsive, the Chinese have done a great job on this as it is the top implementation of the big brother mi9, it has everything from android 9 and went to android 10 in 3 months, miui 12 is about to make its appearance on the phone.
Very positive: the curved back with the color schemes, and the illuminating xiaomi logo, the fingerprint on the front, the excellent cameras that elevate the phone, anyone who needs a better camera should try with a dslr, for the skeptics, install gcam, it didn't impress me much, the excellent performance of the Snapdragon 710 but the 6 GB make the phone outstanding, flawless videos.
Positive: The excellent triple camera capability with 48 MP, 8 MP, 2 MP.
Probably negative: the battery with heavy use of games, browsing, social media, it may or may not last a day and a half, especially with the upgrade to MIUI 11, but they will probably fix this with some updates, some people might be put off by the fact that it heats up a bit when talking for more than 10 minutes.
I have the blue one, the 64 GB version, signal is great, many people are concerned about SAR, okay, it's within the specifications.
Edit: after the arrival of MIUI 12, the phone has been elevated, I feel like I bought a new smartphone, great job on all levels, I recommend buying it unfortunately only from abroad because I see that Greek stores have turned to new models