Review on Blue AppleRound Air Stability Wobble Cushion With Pump - 34Cm /13.5In Diameter - Ideal For Balance, Sensory Stimulation And Active Sitting by Chris Mania

I bought this because I used to love sitting at my desk, using an exercise ball as a chair. However, the height wasn't right for my new desk, and -- when I'm writing or doing something that requires 100% focus -- balance issues could intrude.So, I tried this cushion. It's not a perfect substitute, but it's pretty good. At the moment, I use it about 1/4 of the time I'm at my desk.The cushion is well made. One side is fairly smooth, for sitting on. The other side has a raised pattern on it that you can stand on. The pattern prevents you from slipping around on the cushion, and I'd bet it helps with acupressure points on your feet.I bought it to sit on at my desk. I spend a lot of time at the keyboard.At first, this cushion felt like it did exactly what I wanted: It gave me a sense of subtle exercising without consciously thinking about it.Then. okay, there's no delicate way to say this: My bottom fell asleep. Totally numb. Basically, the shape of the cushion cut off circulation to my thighs.So, I let out some of the air in the cushion, thinking that would help.Wrong choice. Things got worse.Next, I inflated the cushion more than I had when I first tried it.That helped. I could sit on it for a longer amount of time without feeling numb.I'm still adjusting the pressure. So far, the more I inflate the cushion, the better. I'm just trying to avoid exploding the cushion with too much pressure. (The rubber is so heavy, I doubt that's possible, but hoping to avoid any ka-BOOOOM sounds that cause the neighbors to call 911. well, I'd like to avoid embarrassing explanations to the police or fire departments. I mean, really, how could I explain over-inflating a cushion to keep my butt from falling asleep.?)Worst case, I'll flip the cushion over (to the standing exercise side) and use it for my workouts.All in all, I think this is a good product for the price. It's well made and even comes with a spare inflation stem.