I started caring about seats when I got a slipped disc, whereby if I sit in an unergonomic chair for too long my back starts to hurt. I didn't have high expectations but I felt I had to order something to try and alleviate the pain.
To my surprise, after only 2-3 days of sitting on this chair, my back pain was gone. I had read it was developed by a doctor specializing in back pain, but I just assumed that was marketing fluff, but it really does work.
To anyone who suffers from back problems the same as I do, don't hesitate, spend the money and use it, not just for drums but for computing as well. Thank me later.
The back support is quite flimsy, but it's not supposed to be used with a chair like this regardless, the seat is supposed to encourage you to naturally straighten up and sit upright, and it works, I don't normally sit upright but with this chair I found myself sitting upright without thinking about it. Marvelous. Get it!