More comfortable than a plain flat topped stool. The wheel base on this model is more narrow than I was expecting, about 18 inches approximately, but it does not seem prone to tipping after a week of use on a non-carpeted surface. I wish there were an option to tilt the saddle seat front to back, it does not fit quite as well in the lower position as in the upper position. But overall this was completely worth the money, I will probably buy another for my other office.

Really great to sit on for some time but I wouldn't be able to do the full day on it. I use both my normal chair and this saddle during work and it makes me go through the day without any back problem.