I have the sketchers and OH the soreness in my back and stomach for the first week.
I wear them because I am trying to keep my left foot from turning out (residual from a car crash a few years ago). They do help and if I walk in them all day you do feel it (calves, thighs, ankles, stomach, back all the way to shoulders). I have noticed that my ankles and calves seem trimmer but that's about it (would take a lot for the rest of me to change.. more then just the walking). But I also do a lot of the rocking motions and toe raises in mine as well.
I plan to wear mine at disney as I feel like I'm walking on air LOL. I'll have other shoes just in case I get to tired.
On the down side they are very bulky and can be difficult to drive in. Also, once you get used to wearing them, regular tennis shoes feel weird.