I recently purchased the Matrix II Plus Back Black chair and it's fantastic. The chair is very nice and incredibly comfortable, making it perfect for sitting all day. Its excellent back support allows me to remain seated for long hours, which is ideal for both my post-graduate life and professional work.

great purchase, solid firm feel, well worth the extra cost to purchase a great chair

I've had this chair for over 3 years and use it for working from home. When I'm not working it lives in the kitchen as I have a chronic illness and can't stand for long periods while preparing food. It hasn't missed a beat. Super comfortable to sit in for hours, the foam is very supportive and doesn't feel hot, and rolling around is smooth. At one point the castors stopped rolling, turns out they were full of lint. Since I levered them apart and pulled out the dust bunnies, it's as good as new. Can't say enough good things about the chair - I didn't have high expectations at this price point but it's done a fantastic job and is still going strong.