It is the nicknamed my passive pilates chair because it makes you work your core muscles when you’re sitting. The ball ends up being a lot firmer than i realized it would be, but that's better for your posture. Wearing full back brace for hypermobilit...  Read More

Now that my ball is fully inflated with the leg extenders my legs are at a >90° angle while sitting on it. It is sturdy and the perfect height for me. I appreciate that it fits under my desk so that i can have that space open when i need it.

No trouble inflating to size, but must press hard to insert casters all the way. Keep blowing it up and deflating for a few days. Casters work suprisingly well on carpet.

Total scam. Wasted money. Don't waste your time or money on this mess. The only reason i am not returning it is because i can still use the base with a different ball.

This product you are passing off as the original (including in the photos) is subpar and you should do better. The picture is deceiving. Ball is ridiculously tiny.

Claims of puncture resistance and durability do not apply to the ball itself. It sinks down into the holder, making it very uncomfortable to sit on. The annoyance competes with curling iron cords.