My only complaint is that my butt was extremely sore after 3-4 hours of use. I'm not that mad because I've seen similar chairs marketed as "3-4 hours of use" so I'm assuming this was marketed similarly and it's more comfortable than my last tall chair but I'm still annoyed. I'll have to look into buying an extra cusion.
I have had it forever about a month and so far so good. Comfy fits different a levels of desks. The only reason why I am not giving a 5 is because it would be great if the wheels could be locked.