It is true that it might be more slippery for your feet. Nevertheless, a great training tool. I bought it as a training and fun device. And late last year because I had an ankle broken me, the knuckles makes even faxing. But thanks to the Board probably not be long, super to train the agility and the muscles. Incidentally, there are several sites with different exercise instructions on the Internet. I take it, for example to make to dips or squads, push ups and situps goes. I have taken up the tip with the brushing. High training and fun factor. I am the way, mostly barefoot on the board, with socks is difficult and shoes are not as effective and somehow makes me not so much fun. The balance training I have also by a Home Rider Skate (Mike Jucker) supplemented. I can only recommend a real challenge and makes great fun.