Just to offer a contradictory opinion, I have two Noble Hero chairs, one in my office, one in my radio shack and they're both great, very comfortable and easy to sit on for hours at a time. So much more comfortable than the Markus I had before.
Using a Noble hero here, never regretted.
Chairs, except the very nasty stuff, is a very particular choice/taste.
For me, the firm Hero properly sorted the back pain I was having using other chairs, but I must say that I never tried the proper office chairs either.
For someone who spends more time working rather than gaming, the posture required would favour a proper office chair, I guess.
But my use, except when commenting on something here, is either watching series or playing, then the Hero works perfectly for me, may not for all, but for me does.
Quality seems to be fine.
Tried half of the price from Amazon and the seat cushion flattened within a week.