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My experience (community)
I used a cheap office chair for about 15 years, I changed the wheels and little else, the truth is that it needed to be reupholstered again (it was disgusting) but out of laziness I bought a newskill kitsune.
It is comfortable and adjustable, it comes with a lumbar cushion and a neck cushion.
Cons, for my taste the lumbar is small and the neck one is too big.
It is made of simple faux leather and the joint of the front seams of the backrest have been marked (peeled) by sticking it to the cover of my desk.
Otherwise it is almost perfect.
It costs about 140 on Amazon.
I use it all weekends for 3 hours in a row and then another 3 hours after lunch.
I have no "temperature" problem in summer or winter, I don't have air conditioning.
At work the technical office people (10 hours a day) use Ikea chairs with mesh backrests.
They are ugly ugly.
But none of them complain about comfort issues.
What I do dislike and a lot about both (I had to assemble them all) is the anchoring of the pneumatic piston at the bottom (with the spider of the legs) which is by simple gravity, it doesn't have fixing screws.
And that must generate play in the long run.
Regards