The provocative title is intentional. The application of the role is very stressful and equally painful but very effective. I previously used for self-treatment a small ball, so it is now easier with the role, because they do not slip away so quickly. For my part I have found in this role a perfect complement to self-treatment with classical massage. The exercises I design so that they loosen both the aching muscles, as well as full body exercises represent. After half an hour with this role I'm drenched in sweat as well-trained athletes. I recommend this black devil part to all those who have enough body control to treat themselves and can also withstand pain. Whether tensed thighs or calves whether the fascia stuck in the stomach or the back extensors are cramped ... it rolls the role soft, you just have to endure and want. Then it's a significantly better and so does every day hurt less. Perseverance is the motto. Mir helps ungehmein. Unique recommendation. The price is fierce and you might have paid my just a piece of insulating material expensive. Material value is probably insignificant. Think the idea here is the price and that is just awesome.