This chair, I bought it for my big teen who spends his days glued to his screen. After months of intensive use, gaming and other, nothing has changed. It is always pleasant to the eye whether or when one sits on it, no creaking, something that moves or traces of wear.
This is exactly what I wanted, a great chair, close professional products I use every day, but at a reasonable price.
As stated by others, and in the detailed description of the product, the original wheels are casters for carpet, on which they work perfectly. So on hard ground for a perfect rolling, they must be replaced by suitable wheels optional. That said, it still rolls on hard ground.
Contrary to what I read on some reviews, there has a back angle adjustment. Just knowing how to use the joystick, which is pretty well done.
I also have read that beyond 1m70 he was uncomfortable. For me it is totally false. I measure 1m92 and actually, for me, the issue is not quite big enough, but not uncomfortable either. But for my son who is in the 1m80, it is perfect.
In terms of price / quality ratio, I'm more than happy with this purchase. I also find that some commenting forget the very low price they paid (for this type of product).
Personally I have had exactly what I expected: an almost pro product for a totally reasonable price.