I like the color and the concept. However, the problem I have is that the size ball they send with it is too small and does not fill up the void of the material. In addition the pump they provide does not work. If I did not have my own pump I would never have gotten it pumped up at all. The material at the top of the ball is still sagged after I pumped the ball up because the ball is not big enough to fill out the material. The ball size also does not provide enough of a seat except for a younger, smaller person. Maybe they need to offer this in two sizes child and adult?