I’ve not tried it for long yet but it seems very comfortable so far, and good value for money. A doddle to put together - I didn’t even need a screwdriver as there are no screws. It slotted together in under five minutes. The up and down mechanism works well and the tilts well too. The only reason I’m not giving it the full five stars is that there’s no retaining screw on the back, which means if you move it by the back it can slide up a bit but it’s not a big issue. The only other complaint is that the seat needs more padding to be truly comfortable if you're on it for any length of time.