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

I had been using the full on ball chair at my desk at work for a two to three years- a couple of other people had got them too after trying mine out. Then they moved us to a new building with new cubes, new chairs and a lot of rules guaranteed to lower morale and thwart productivity. I didn't even try to take the ball chair. Then I saw this on sale for Black Friday - I didn't even know they existed and was excited to find it. Unbelievably it arrived in only one day so I was ready bright and early Monday morning to pump this up and place it on my new, regular office chair.It pumped up easily with the pump provided and now, most of the way through the second week of sitting on it for eight hours a day, it is still as full as when I first pumped it up. One side has bigger nubs for if you want to stand on it while you work. I haven't tried that yet but I do sometimes work standing up and will try it next time I do. The nubs on the sitting side are smaller and you don't notice them at all. It works very well as a wobble cushion because it is smaller than the area your backside would normally cover and stands a bit over an inch higher than the seat itself. It provides some work for your core to do as you are correcting your balance, almost imperceptibly sometimes, every time you move. Most of the time you don't even notice and I forget it's there. But when you pay attention to what's happening, the need to constantly correct is definitely effective.I prefer the ball chair - now at home and still in daily use - but this is a very viable alternative, at a great price.