Bests & Worsts Reviews from Amazon

First off, all of these 1 star reviews with pictures...completely misleading. Half of them don't have the ball inflated all the way, the other half put the back rest on backwards! lol YOU HAVE TO AIR THE BALL UP SLOWLY. Once it's at room temp, stretch the ball material away, so the sides aren't sticking together. Inflate as much as it will go, YES IT WILL LOOK SMALL! Wait about 24 hours, release about 50% of the air, and refill again. This time you'll notice that it's gotten a lot bigger. If it still doesn't fit like the photos show, make sure your back rest is facing the right way. This material can take a while to stretch out. Even if you choose to not read the instructions, the assembly is incredibly easy. At first, I was afraid that it would be too low, however if you follow the instructions on properly inflating the ball, it's actually at a perfect height for my desk. Im 5'4" When seated, whether I'm more toward the front or up against the backrest, I immediately notice a difference in my posture. I have had an out-of-place SI joint and constant spine problems for years now. If you sit at a desk all day, this really helps to alleviate any pressure on your sacroiliac joints, along with the sacrum itself.