I originally bought this product in 2015 and I'm still using the ball almost daily.My original yoga ball from a different brand kept deflating, so I decided on this one as a replacement. Originally my intention was to practice yoga more often, but admittedly I use this more for sitting on while I work.I sit on it about 5-6 hours a day, 5 days a week while doing my video calls for work, and I've found my stability has massively improved. When I first started sitting on a yoga ball while working, I could only sit still for minutes at a time before eventually having to shift or bounce around, but now I can sit still for an hour or more if I want. I'd say my posture has improved a lot because of this ball, and that's why I continue to use it for work.
Rating: [4 of 5 Stars!]