What the description of this ball doesn't tell you is that 55m is for people 5' to 5'3". I'm 5'6", so it's a bit small for me. However, the ball itself, is very sturdy and will hold weight up to 330 lbs (also, not mentioned in the description). I didn't have any trouble with the pump. While taking the ball to the gas station and filling it up would have been quick, I just considered manually inflating the ball as additional exercise. The hand pump works well and there's a tape measure so you know exactly how far to blow up. There's a slight plastic smell at first, but it goes away by the time the ball is blown up. The wrinkling of the ball will go away within the first 24 hours it's blown up. I'm keeping this smaller ball to do Pilate exercises with and getting a larger ball for core work. Really, the reason why I'm only giving this 4 stars is because the description is not complete enough to allow someone to make the proper purchase in the first place. The quality of the ball is great.