I see that many are talking about its autonomy, which is not really 30km... The 30km autonomy (according to the manufacturer itself) has been achieved in tests on flat roads, without wind, at 25°C, with a rider weighing 75kg and a speed of 15km/h. Obviously, it is never possible to achieve the autonomy stated by the manufacturer of any company. It is not possible to use it in speed mode and on uphill roads and expect 30km autonomy. Its actual autonomy in my case is +20km in speed mode.

On the general positives of the scooter:
+ very good acceleration
+ very good brakes
+ quality construction
+ very economical, as spare parts are available for everything and are very cheap. Its charging lasts about 5.5 hours from 0-100% (based on the manufacturer's data) and the cost is estimated to be around €0.07 for a full charge with the current billing data from the electricity company.

Negatives:
- It has no suspension, which makes the ride a bit uncomfortable, especially on the roads we have in our country.

24/11/2022
I have the Xiaomi 1s since May 2022, having covered 1,100 kilometers with demanding requirements as I was coming from a 48-volt and 500-watt scooter. I can say that it is one of the best; its tires hold up wonderfully if you pay attention to the pressure, even on very rainy roads. It has no issues on uphill climbs unless the incline is over 10%, where there is some difficulty (I weigh 72 kg). In terms of autonomy, no matter how hard I use it, it has never dropped below 15 kilometers (the battery is 5,300 milliampere). Regarding temperature, the scooter has never reached a temperature above 40 degrees, even in the summer months. In terms of quality, words are unnecessary; as I mentioned, I use the scooter hard, and apart from the uphill climbs, it has often gone on dirt roads (not paved), and its performance was more than good as it held up wonderfully. Its brakes are quite good, and I never felt that it didn’t brake effectively, while the ABS on the electric brake behaves wonderfully and engages whenever needed and not at random moments. The lights are excellent, and I have never felt that I couldn’t see or that I wasn’t seen, even on the darkest roads.
Now, regarding problems due to hard use and road irregularities, the folding mechanism had started to creak, which I completely eliminated with a little oil I put inside the mechanism; it stopped any kind of creaking. Another issue is the rear fender, where the initial installation screws are in no way suitable for such hard use; the cost is about €2 to replace with 2 good reinforced screws on the arms of the rear mudguard.
Now, on the negative side, there is a significant discrepancy between the autonomy claimed by the company (30 km) and the actual autonomy, which is around 18-22 km with normal use. In the 1,100 km, I have not noticed any other issues or negatives. That’s all from me; if any other issues arise, I will let you know.

As an owner of the s1 for a year now, I thought I would leave a review as well.
To start, the downside is the battery. I weigh 73 kg and the 30 km it advertises simply does not hold true. I don't know how others measure the kilometers and come up with those numbers, but it has heavy usage up to 15 km of autonomy.
This and a creaking noise from the folding mechanism.

Other than that, it is a gem. The 25 km/h top speed it promises is easily achieved with a full battery, even on slight inclines. Around 70% and below, it struggles to accelerate, but it still reaches that speed, though only on straight paths and without wind. Around 30% is when it starts to cut off until it leaves you. At 15%, it goes at 10 km/h.

The instructions say it is not waterproof, but it has held up well even in heavy rain. I had the misfortune of getting caught in a downpour on the road or needing to ride it after heavy rainfall several times. It still works. Of course, this doesn't mean you can make it underwater. In puddles where the water is up to your ankle, it's better to get wet yourself than the scooter.
The rain probably also explains the creaking I mentioned earlier.

Very sturdy construction for its weight. It has endured countless potholes while riding around Athens, and one of them was such that it blew the front tire. No damage to the frame or the motor. Kudos to Xiaomi.

Its brakes are very strong. Especially with a full battery, it stops very easily since the front is an electric brake. HOWEVER, great caution is needed because it can be deceiving. You think you will stop easily if something jumps out at you, but you might end up in trouble. I repeat, great caution. It's not the tool's fault but the wrong assessment.

As for inclines, it again depends on the battery. It has enough power to climb most of them, but obviously, it cuts many kilometers until the road levels out. And if you plan to go up to Pagkrati, just forget it.

As for weight, I think it can handle quite a bit more than the 110 kg it mentions. I do my monthly shopping and load it onto the handlebars. It has shown no signs of fatigue, although in terms of balance, with that much weight, it's up to you whether you will fall or not. If you can handle it, it will take you. If not, you will carry it.

And one last thing... You can ride it with a flat tire, but it requires great caution. If you shift your weight back, it will go, but turns are the most dangerous as the tire wobbles. And I imagine it's not the best for the motor. I found myself in need and did it, but obviously, I do not recommend it.

And a tip for every potential rider. Install a mirror. At least a left one since you primarily ride the scooter on the right edge of the road. You save endless effort and awkwardness from turning to see if anyone is coming behind you when you want to turn or cross a street.

Overall, a very VFM purchase. For a year now, it has endured crazy misuse. And it has shown no signs of exhaustion. Neither in construction nor in autonomy/top speed. Whatever it delivered at the beginning, it delivers now.

I give it 4 stars solely for the autonomy

The scooter is amazing. I've had it for a month and I can comfortably cover distances like Rendi-Omonoia and back, for example! I am 1.85m and 103kg, and the scooter easily reaches 25km/h in sport mode and can hit 30 downhill, while on uphill slopes of 10-15°, for my weight, it goes at 17-20km/h normally. Above that, the motor heats up and underperforms. Ideal for daily use unless you live in an area with many hills.

For those wondering, this scooter, in its factory settings (speed 25km/h, power 250W) DOES NOT REQUIRE A LICENSE, but if you want to upgrade it (the max settings, if I remember correctly, are 35-45km/h and 500W, it might be more, I haven't looked into it), you will need a license for a 50cc (50cc) and to get license plates from the traffic authority. For this reason, it has a support for 50cc license plates at the back. It doesn't have suspension; if you want to add one, you need to buy a replacement. For 1s, I can't find one, logically you would get a suspension for the mi 365pro and install it yourself.

I've had it for about a month (July 2021)! Although hesitant about the purchase, I decided to get it! As first impressions, its sturdy construction and speed combined with torque initially give you a sense of fear, but then it becomes enjoyable and very playful! Very easy assembly and connection with the mobile, the package had exactly what you need along with a spare tire and inner tube! Its battery is satisfactory; in sport mode with the setting to brake the motor when you release the throttle for energy recovery, it achieved about 15 km... (I expected it to perform better.) As advice, what should be checked once a week is the air pressure in the tires...
It's worth the money (340 euros 07/21).

*Update 17-8-21: So far, everything is good, many rides, it has covered a total of 172 km, now its battery in sport mode performs as it did before, I haven't noticed any difference! I recommend using D mode in the city. It has more autonomy and doesn't have as much torque!
Update 31-8-21: With about 200 km on the odometer and switching between D and S mode, it achieves about 13-15 km! No other observations! I just take it for rides!
Also, tire checks have become more frequent because due to the heat, the losses were quite significant!
**Update 24-11-21: With now 377 km on the scooter, the battery easily gives 15 km in S Mode! The only downside is that at the point where the handlebar bends from the vibrations, it has started to make noise and shakes a little! I solved it with 2 euros; I bought a rubber washer that you can find on Skroutz, and now everything is as it was when I got it! The charging time has increased a bit compared to when I first got it! For 0-100%, it took 4.36 when I got it, while now it takes about 5.07.
VERY IMPORTANT to get a screen protector from water! I didn't have one, and a little water got in, and I had to unscrew it (very troublesome) to clean it so that the screen wouldn't get damaged!

***Update 17-04-22: After some use in winter and many passes through wet roads, now tested, there is no problem with short circuits or water passing through!
With 410 km now, I really have worn it out!! In some turns with water, it slips a little! GREAT CAUTION.
I will try flat tires to see if they have better grip!

P.S.1: It would be good to also get various accessories like a protector for the stand to avoid scratches and also shock-absorbing bases to prevent problems during vibrations...
P.S.2: Avoid uneven ground, potholes, steps, manholes, etc., as much as possible, which shake the scooter.