I wanted to use this for sitting at my desk instead of a chair. However, it's a bit short. I needed a bigger size. (I wasn't taking into account squish factor). So, I will try again. Maybe the bumps aren't great to sit on either (but not horrible either) The color is a bit more milky, nicer in my opinion in the picture. It seems to stay inflated. I have bounced around on it some while watching TV. I haven't killed it yet. I also had to buy something to inflate it with since I didn't have a pump. A bicycle pump seemed to work.
In the past when I have ordered exercise balls they have come with a pump. After completing a live chat session with a costumer rep I was informed that none of the balls come with a pump and none are available from Overstock. I suggested that they mention this with each ball as a courtesy to their costumers. The rating is based on the pump problem not the quality of the ball since I haven't been able to use it yet! Now I have to see if I can get the ball inflated at a gas station!!! Everything else with my order has been fine arriving in good time and in good condition.