This chair has zero seat cushioning. I have used this chair for ten days and it feels like I am sitting on a park bench. I am 170lbs so that my weight should not be an issue. Total garbage.
My wife has the Aeron and while this doesn't compare to that chair I'm very pleased. The adjustability of this chair puts it above many others in this price range. The mesh back is cool and comfortable. The seat is not as comfortable as some others but the ability to get it set just how you want it makes up for that. I've only been using it for a week or so but I would definitely buy it again.
I read an ariticle that provided ergonomic desk chair reviews by physical therapists. This chair was reccommended for persons with short legs. In one week of use my hip pains have diminished my neck pain is gone and my perpetually sore mouse wrist is drastically better. It looks great feels great and is simple to assemble. I highly recommend