I am so happy with the p.ball. First, the attention to detail is a real stand-out: the p.ball comes in a bag, with a pump, and a small leaflet. Inside the pump you'd have the needle so cleverly stored. What's more, there is a ruler to measure the size of the ball in order not to over-inflate it. Love it. Second, the ball itself is exactly as described, and it is very easy and intuitive to use. It looks sturdy too. Thirdly, it makes my sensitive body parts - booty, thighs, legs -, and even arms work so efficiently. One of the reasons I signed up to streaming and buying the equipment was that I'd noticed how efficient the p.volve workout system was when I was doing the free trial (and also a demo class in London). Even after a few workouts I noticed some toning in the above mentioned wobbly body parts, and I am quite confident that it is up to me now to transform my body even more: I am sure if I consistently do the exercises and use the equipment I will achieve the body I desire and which appears in the endorsement materials. In short, it works. It is also a low-impact exercises, which is important for me as I am at the age where increasing stress hormones by vigorous exercises is no longer an option (I used to be a sprinter, so I used to do lots of weights, HIIT, and of course running, but these exercises no longer help with toning my body - they just put too much stress on my system) - and p.volve is a low-impact but high efficiency system.