Bests & Worsts Reviews from Amazon

I was looking for a ball to use as an office chair. It couldn't be a crazy color because it would be in an office setting and the shiny rubbery ones look like something kids would play with. This ball looked great because it was a neutral gray, didn't have any crazy markings except "DynaPro" on the side, and had more of a matte finish. I was nervous about the reviews questioning the size of their exercise ball, but I decided to get one anyway. I'm 5'5" and most exercise sites told me to get a 55cm ball. When using one as an office chair, you're supposed to go up one size so I purchased the 65cm version. My desk is average height and 65cm would go at least 4 inches above my current chair (which other sites have recommended). It came in 2 days early, a very nice surprise! The ball looks just like the picture and it's made of a thick, sturdy material. The pump was a little odd at first since I thought it was sucking air out of the ball instead of pumping it in. Just put the nozzle in ball and pump as normal. The device will sound weird, but it's working just fine. The first time I inflated the ball, I was disappointed with the size. I was a foot lower than I thought I should be! I gave it another chance and started pumping more. Even if I didn't think it made a difference, I kept putting air in. This definitely helped, it was nowhere NEAR full! After a few more tries, it was almost to the height I wanted. I debated returning it, but the card inside the packaging said to give it 24 hours for the material to fully expand. The ball even had dark "stretch marks" on it where material hadn't fully stretched out yet. This morning I came into work and started pumping in more air. I noticed that once the ball is inflated fully, the pump no longer lets out air as many people complain. Once you push it in, some sort of air lock happens and it doesn't change until you start pulling back the pump again. Now it's the PERFECT height! It's very tight, but after a few minutes of sitting on it, I stopped worrying about breaking it. Hope this review helps clear up some of the questions people have, I was wondering all of this when I first got it!