No sooner had the part arrived, I have the device in accordance with instructions assembled (idiot proof!) And thus made my first practice round. Cosy 10 times at full stretch. Striking is the good and robust workmanship. The device is great. In addition to push-ups and crunches more exercises with this unit are bringing a fantastic addition to the upper body in shape. I have trouble to steels with crunches my obliques - therefore I have since developed its own method .... The device I can now effectively reach my obliques and demand. Coordinating you have to practice, but at the first practice round I immediately realized that it is a crisp affair. The device really makes noises while exercising. This is due to the spring mechanism, which ensures a support on the way back. Too bad that you can not turn off this mechanism. My friend looked at once another purpose: one can thus prima ausmassieren large body regions :-) That is not so in the instructions but their positive reactions legitimize a possible misuse: So roll with gentle pressure on the latissimus dorsi or the thighs or calves roll towards the body ....