Very good chair, big, comfortable, a bit hard but unfortunately for me it doesn't lock completely, there is a gap and it rocks back and forth. In my communication with the company they consider it normal even though other users don't have this issue with their chairs.
Edit: after a year, I notice that on the seat the seams started to show, at the point under the knees. Unfortunately, completely disappointed

Excellent chair. I find the adjustment of the support "frame" a bit dysfunctional, maybe it needed to have a larger area as a mechanism. Overall, it is very comfortable and spacious even for me (1.90-85kg)

It has an adjustment for the call on the back and the armrests have height and rotation, and the magnet on the cushion holds the cover if you put it on. It is sturdy

I am 1.85, 150 kilos, and after a lot of thought about the outrageous price for a chair, I decided to buy it. The best purchase I have made in my life. After 30 years on this planet, I felt like I sat for the first time in my life, and my back agreed. It opened my third eye. My only complaint is that after 3 months of use, in one part of the seat, some seams have started to show wear, but this may be because I sit like a madman. I will talk to the company and will get back to update on their stance in this whole situation. 9/10 relaxed

Excellent choice for the price. Very well-made construction, easy to assemble. I bought it from an e-shop for €449, and it is truly a very sturdy construction with a durable frame and wonderful finish. Its color is better than in the photos, with careful stitching and details. Comfortable position adjustment for firmness and height, as well as a magnetic cushion and magnetic arms.

1.80 100 kilos, very comfortable and quality chair
I fit in the large but for fuller people the xl is more convenient and for tall people, of course, you go xl
personally, I had a problem in my back before the purchase and after 2 days of use the pain disappeared so for me it was a win purchase
as for the temperature issue, guys, we are in Greece, we melt in the summer no matter what happens

I have had it for 2 years now and I am very satisfied because even though I have a problem with my back, I have never felt pain no matter how long I sit on it. I work from home for 8 hours and another 2 hours I play to relax... sometimes I think about reclining the back and sleeping on it, that's how comfortable it is

The 54 centimeters of depth are not enough for tall people; it should be 60... (I am 1.85m 123kg) The same applies to the width, which due to the inward slope does not allow you to spread out... The result is that it presses on the legs at the back and tires you out!!! It is hard!!! Like sitting on a wooden board!!! Due to the faux leather, it is warm... so in the summer, it needs a cover to avoid sweating.... It's a shame because the construction is of good quality

I have it here for about two months. It is extremely comfortable and convenient, especially for someone who is big and struggles to find a chair.

At first, I thought it was expensive. Once I saw what it is, I'm telling you that it's worth its money and more. I see some cheap chairs in office supply stores that wobble and are sold as office chairs. They are ridiculous and more expensive. Then you will understand what this chair is. As for the size, I would recommend the XL, don't take the guideline seriously that says up to 1.80 height for the L, which I believe is only for children. Get the ample one and you won't regret it in my opinion (my height is 1.78).

I bought it for my work.
I had one for €200.
I have an issue with my spine.
As soon as I used it, I set the back adjustment wrong.
Once I fixed it, my waist also improved. No pain since then.

Here perfectly fits the saying "you get what you pay for". For someone who wants to invest in a quality chair, for me personally, it is definitely worth it and more. It is true that it is not a small amount of money, but when you sit on it, you will understand the difference from chair to chair.

I bought the XL and I am 1.76. The truth is that if I could, I would try the Large first because it is a liiiittle bit wide for me.

The chair is excellent. The only thing I want to mention because it is not stated anywhere is that the large size is for weight up to 120 kilograms and height from 1.50 to 1.90. The XL size is for weight from 80 to 180 kilograms and height from 1.91 to 2.10.

One of my best purchases. I am 200 Kg, and it fits incredibly well and looks incredibly sturdy, finally a chair that accommodates me. The adjustments for the back and the waist cushion are UNBELIEVABLE. Finally, my neck stopped hurting after 1 month of use.

It has a bar that runs exactly where you sit, so you start to feel it as soon as the cushion is pressed down a bit. And generally, for its price, it is not very well made. The armrests move quite a lot, the lumbar support is hard and slow to adjust... On the positive side, assembly was easy with good instructions and the backrest is very easy to adjust.

Although it is one of the better gaming style chairs, I wouldn't recommend it for over €350. I believe there are better office style chairs for the money.

NEGATIVES:
In the 6 months of daily use, it has already torn on the back where the logo is. Instead of putting it as a patch on top of the main material/fabric, they decided to make a hole there and put the logo as a separate piece, resulting in the seams tearing and gradually falling apart.

The arms, which move annoyingly, have metallic buttons for adjustments that I think are made of pewter and have a coating that has already peeled off from the few times sweat touched them.

The backrest adjustment does not work, so I have to hold the lever with one hand and pull the backrest with the other.

Definitely not worth the €450 I paid in terms of quality of construction.

POSITIVES:
It is quite comfortable and does not tire even with 15-20 hours of continuous use.

It withstands my weight even when I lean all the way back, I have only fallen off twice :D

Today I received it and with a first impression I can say that it is very good.
Amazing construction quality and awesome seat.
Very easy assembly.
It has many positives but I want to mention the two negatives,
1. Quite expensive while you can get Secret Lab for the same price.
2. If the fabric gets dirty, it's an issue... but compared to the Leather one, I prefer it since it doesn't make you feel as hot.

10/6/23
I have had it for almost a month and today the mechanism stopped going up.
I sent it for warranty and I'm waiting for an update from Monday or Tuesday!
It's very bad that the mechanism doesn't work properly and it costs so much

Very good chair and good construction quality. The lumbar pillow is a bit special as it is simply located inside the chair and you adjust it, but at the same time quite convenient. The magnetic headrest is very comfortable. Overall, it has several adjustments for an office chair.
It doesn't bother anywhere and no iron or anything else is thrown, unlike what I read about the Kaiser II, and it is quite comfortable. I am 1.92 meters tall and it is just right. If I tilt it back, I feel like I need a footrest to make it even more comfortable.
I can't find anything negative, except for the price, as it is quite expensive for an office chair, but it doesn't lack anything.

Awesome chair, you immediately understand the quality. Perfect support for the right posture. I am 1.90 meters tall and weigh 120 kilograms and it helps me sit perfectly at the desk for hours without any discomfort. Compared to a previous chair from the same company, you can see the difference in quality even from the packaging and assembly.

The chair was purchased in December 2022 after a lot of searching and having problems with my back. I use it for hours due to the nature of my work. It is comfortable, cozy, and the XL size is great for tall people (I am 1.88 meters). It can withstand a lot of weight. The plastic holes that are visible at shoulder height do not affect at all, meaning you don't feel them when you sit or even when you want to lie down. It is easy to assemble (it comes with instructions), it is heavy but a tall person can set it up without help, they will only struggle when trying to screw the back with the bottom part. The fabric is recommended for me because it feels better and is more comfortable during the summer months. I highly recommend it for people who sit for hours and want a very good chair.

Very good and durable chair. Several adjustments.
Attention, at least the XL size is quite tall and especially if you lean back, you may need a footrest.

Assembly is very easy, even for one person, but it is quite heavy. Especially for carrying the box, you will need a second person to help you.

I bought it for office work from home. The packaging is bulky and heavy, specifically 32 kilograms. The chair itself weighs about 30 kilograms. Assembly requires some physical strength as the two main pieces are quite heavy.
It is sturdy and of high quality construction. It is comfortable and you can work for hours. Of course, this does not mean that a chair, no matter how good it is, will save you in terms of your health. Obviously, you will need to get up, take breaks, exercise.
The adjustment for the waist to provide resistance is very convenient, I set it at the beginning and have not touched it since. The armrests are also comfortable.
Overall, I have not encountered any problems.
Finally, regarding the price, it is very expensive. Someone can do their job with chairs from the same company that cost 100€ - 150€ less. At this price, I recommend it only to those who know they will keep it for several years in order to amortize it and make sense. It is primarily a work tool.