These chairs are wonderfully comfortable and support the back perfectly. They were easy to assemble. I left the head support off because it wasn't comfortable for me. This was my second chair like this. The lift in my first one eventually failed but my husband is still using the first chair because he doesn't mind sitting so low. His is black; mine is the red one.
We had purchased one of this more than a year ago. We bought another one a few months ago. The chair is excellent and so are the assembly instructions. However it came with coasters for use on carpeted floor with instruction to buy coasters for hardwood floor separately. The choice of coasters should have been given at the time of accepting our order so that one set of coasters and our money would not go waste. For this reason I have scaled back the rating by one star.
I've been treated to more expensive Herman Miller chairs at work for years and love them but was looking for a less expensive option in the same style for my home office. This chair fits the bill. It comes in at a fair price point and is comfortable for long periods of use. It rolls fine height adjusts without a problem arm rests are firm but comfortable and it holds it's tension well when you lean back. I'm 6' 1'' and the headrest jabs me in the top of my shoulder blades but my 5' 4" wife fits it perfectly. I have a tendency to take the headrest off if I'm going to be working from home for more than an hour or two but it's comfortable without the headrest as well. Overall I'm satisfied with the purchase. If you have the money available you'll get a better quality chair by looking elsewhere but this is acceptable for regular all day use at a low price point.