I own the Togu Ball now for about 9 months and am very happy with it. A significant loss of air I could not find so far. At first the ball naturally smells something, but that fades pretty quickly. During pregnancy, he served for exercises and to support the back. When our son was there and then often times suffered from abdominal pain, it helped him and calms him when I cradled him on the ball back and forth. I use the ball still like to support the back. Highly recommended!