The first sports unit has already completed assemble after. The mating is relatively easy, at least if one discovers the difficulties identifiable markings, but the massage nodes must all be individually pressed into the tire. The connectors have a good time, but you should check them regularly. Overall, the tire makes a rather cheap impression. The individual parts are processed from cheap plastic and partly bad. But that's not the reason for the poor rating. I had to get on top uncanny difficulties the tires at all momentum and have seriously doubted my Hulahoop skills (as a child I was really good). Over time, the training was also really painful. After 15 min. I then canceled and the result was not slim, but one littered with bruises waist. Overall, I've been training with the tire 3 times, then I bought a foam covered Hulahoopreifen Tchibo. The tire swings super and leaves no painful bruises! Conclusion: These tires are cheap and only hurts!