G.W.
I've had mine for a few weeks...I haven't been able to get real heavy into excercise walking yet but have worn them around the house and out shopping....that being said, they definitely feel different than normal tennis shoes and really force you to do a solid heal to toe step which I believe leads to the toning. Anyway, I don't think you should expect any miracles (I haven't anyway) but my experience so far has been positive.