Why didn't you address the tension adjustment for the recline? It doesn't have any, which makes it impossible to keep the chair in a reclined position without locking it in place, which really sucks.
I was thinking about to buy the Office Chair from Hinomi but I wasnt sure if it is worth if 540,- Euros (over ca. 600$). Now I saw your review and I think this makes the best for half the price. Thank you for your great review.