I have been commuting most days of the week for almost a month now, and have seen the weight melt off, the muscles tone up quicker than I even did while using the weight machines at the gym, my pulse rate and blood pressure have all gone down, and I am so much less stressed out than I ever have been. On the other hand, I constantly battle hand/finger numbness, knee pain, and general tiredness from overdoing it. The downsides are definitely worth the gains though!