It's ok after using it, and my legs are really thin after using it. I didn't believe it at first, but I wanted to lose weight and didn't want to exercise, so I bought it and tried it, thinking it was really impossible to exercise. I just got it in official website. I lost a lot of weight after using my legs. I lost almost 2cm in a week. It really scared me. I'm afraid of a rebound. Fortunately, I used the one that didn't bounce. It's really great.