We purchased this chair for our home office from which I'm currently working full time. I wanted something that was very comfortable offered excellent back support and had a breathable fabric. This chair fit all of the criteria really well. It was also extremely easy to assemble. In fact the assembly parts were better organized than for any piece of furniture I've ever put together in my life. My job requires that I be at my desk for long periods of time. I've been just as comfortable after 6-7 hours as I was after 5 minutes. I would highly recommend this to anyone needing a good office chair.
I am petite and find this chair to be very adequate for my size. It is low enough that my feet touch the floor and my back touches the back of the chair. It has many adjustments for taller people as well. It has a springy quality and can tip which feels responsive. It rolls nicely and feels very quality. I have been using it regularly for two weeks.
The arm attachment is just wrong. The slots should allow about 1 inch of adjustment for each arm. But the holes are in the wrong place so about 1/8 inch max. The threaded arm attachment holes in the main base are angled wrong so the bolt head only touches at one edge instead flat fit holding the arm to the main base. It works for me at that position so it's quite comfortable. The mesh is great for air flow. The mesh in the seat is not strong enough nor tight enough for long term use. After 2 weeks it sags a bit. That suggests the chair will be worn out in a year. Would be nice if the arms started out much lower so there's no contact up to about the max height. It's a huge improvement over the totally worn out chair it replaced.