The best chair I have ever sat on! The lumbar support is very good and keeps the lower back where it should be. I bought it from Kotsovolos for 229 euros so if you want to get it from Skroutz, wait for the price to drop.

Easy assembly. Takes about 25 minutes. Excellent value for money at 229 euros. However, be careful. In the terms, it states that the warranty is valid only if you buy it from representatives. Skroutz (or rather the shops that have the option with the blue letters that say official reseller) are official resellers. From shops that are not official resellers, if something goes wrong, razer claims no responsibility.

As for the chair, it supports the back very well and is tall enough that at 1.91m I can comfortably rest my head back.
The bottom part is a bit hard but comfortable and wide. The frame is metal but the wheels and armrests are plastic as usual. The height from the floor is also satisfactory and fits all body types.

Update 21-09-25: The chair has been squeaking for 2 weeks now. It's not because of weight as I am 85kg. I will try WD40

I have had this chair for almost 3 months, so I think it's a good time to draw some conclusions.
I had used other "gaming" chairs in the past, so I have some point of comparison.
Initially, I chose it because it is very stylish and beautiful, and since my desk is in my living room, I wanted something aesthetically pleasing and not a classic bulky chair.
I chose a chair with fabric to try something different compared to my previous ones, and I think I made a good choice.
Nice texture and fabric that doesn't snag (at least not yet).
Very comfortable and wide seat with good lumbar support (but not adjustable).
The armrests adjust in height and rotation, fewer adjustments compared to others, but I didn't miss anything and it was very convenient for me.
The mechanism is butterfly type, and for me, this is a downside. I would have preferred Frog, but you find that in much more expensive models.
Another downside is the slight creaking it makes, and at one point, it's also a mechanism issue.
The assembly is very easy, and the instructions provided are complete. No tools were needed because they come with the chair, along with a pair of fabric gloves.
Overall, I am satisfied and sit very comfortably for about 3 hours a day.
I would definitely recommend it to someone since its price is quite good relative to what it offers!