I love this chair. It is attractive (not massive like the upholstered ones) easy to move around and extremely comfortable. It is also easy to adjust. I started looking for a new chair when I realized the old one was probably the cause of lower back pain. With this chair I do not have any. Incidentally I purchased it at Staples locally rather than on an internet site and again could not have been happier with their sales person service and helpfulness. Forgot to mention - the price is extremely reasonable too.
This chair has excellent features (adjustments and controllability) and is physically supportive. I am concerned with the durability due to its plasitic and nylon mesh construction.
If you are having issues sitting for long periods this chair will help. The chair is sturdy the mesh makes it comfortable and keeps you from heating up your buttocks and back of your legs it has a small lumbar support and adjustable headrest. I bought this chair for my wife to use in her office because I have had mine in my office for 3 years and it is still in excellent condition. Good buy for the price.