I have to say that I was a bit skeptical, but these are really great shoes. I wear tennis shoes a lot anyway, and these are really comfortable. I'm 6 months pregnant right now and can't exercise much because I'm high risk, so I bought these hoping that they would help me to keep in shape. They aren't like going for a run, but at the end of the day my rear end  and my calves ache a bit.  After our baby is born I plan on running in these as well to work out. I wear my tennies outside and flip-flops around the house and I really like both of them. Comfortable and look nice too. Great shoe. Highly recommend!