I am a cycle instructor and trainer. I have been wondering about these Shape Up tennis shoes. My initial thought is that it is a fad, but some of my clients swear they work. I was wondering if any of you out there have them and do they really work for just walking around? I walk a lot, not particularly for exercise, but just day to day activities. Do these shoes work? Maybe I can "workout" all the time if I had a pair. I have to know they are worth it, because I personally feel they are really UGLY! I have so many other cute pairs of tennis shoes, but if they really work I will be willing to invest!