As such, a super great device, it's fun to play sports on it, it is silent and the stage adjustment a flexible sports equipment. Perceived as negative I have the assembly instructions. This is very confusing. The construction has taken about 1 1/2 hours, not least so that some screws could be put on very hard, until we realized that the screws had a left-hand thread, for whatever reason ... The delivery was without problems on a forwarding. Would buy again!