This chair is awesome in that it's designed ergonomically perfect. The ONLY qualm I have about it is that the mesh seat can be a little more comfortable maybe even have a soft fabric over it. And that's it. Otherwise I would highly recommend this chair. It supports my lumbar (where I have issues) like no other chair!
I have been using this chair in my home office for over a year and it was the first choice when I needed to replace the chair at my workplace. Still great quality and mostly easy to assemble.