Overall it's a good chair, and comfortable for long sitting sessions. I have only 2 issues.
1. the headrest is too flexible, it has not method of locking in position to assist with good posture.
2. the back of poorly mounted too its affix point. It is moulded around a steel bar, but it shifts from side to side inside the moulding, making it unstable and my fear is that it will become unsupportive, or break over time.