I like this chair. My only quibble is that when in the tilt position the gap between arms and back is doubled. Also caution must be used to prevent falling from leaning too far backward.
I have had this chair for nearly six months now. It is very solid yet lightweight. I find it to be very comfortable and especially like the breathability of the mesh back and seat. If I need to be at the desk for long periods I don't every get hot and sweaty. The chair is light enough to move about freely on carpet without a vinyl pad but sturdy enough to not feel the least bit tippy (if that is a word). I would not hesitate to buy another like this if the need arises.