Master MassageBerkeley Ergonomic Saddle Stool - Two Split Seat Stool - Hydraulic Swivel Rolling Seat & Saddle Posture Correction Chair with Backrest - Black

This chair was a game changer for me. I had a previous hip injury. My muscles were weak from the time it took for the injury to heal. The split seat keeps pressure of my spine L5/S1 the back support keeps me from slouching. I had a saddle stool before without any back support and found no matter how hard I tried after a couple hours I would find myself slouching unintentionally. This chair has given me the support I need and keeps me lined up. Only complaint though as others have said the cushion is hard and a bit lacking. But I look at it this way. If you have a sit down job you are supposed to get up and move every so often. This chair makes me move or even use my stand up desk option it does me good

This is a great chair for the price. You can buy other versions of this chair for well over $1000. This one hit the price point and is very comfortable. I use it every day as a dental hygienist and my backside thanks me.

The build quality has some issues - one of the holes for the casters was badly formed, though I was able to use some pliers to open it up enough to use the caster.Also, the backrest doesn't hold that well - could be done a bit better.But the worst part is the seat is HARD. I have another Master chair, the one with the large cushy seat. But I wanted to alleviate the pressure that sitting for long periods of time causes, so wanted this split seat option.I will be getting a gel pad to put where my sit bones go to hopefully alleviate the hardness. But be aware it is VERY HARD on the sit bones. It does take the pressure off the central area, though, if that is needed!I also wish the tilt went further back - that might help as well, but it mostly tilts forward.The back rest is helpful when sitting for long periods of time.

This is an excellent chair. The quality was very nice and the chair was well designed.It unfortunately, did not work for my particular problem, but I think it might be an excellent choice for a person with tailbone pain. (Coccyx’s pain, levator ani syndrome, etc)