I have a pair of Skechers tennis shoes that I loved so when I heard about these, I had to try them.  They are so comfortable!  I always buy tennis shoes in a half size larger to accomodate swollen feet from walking or working out and they fit perfect so I recommend buying a half size up.
I have had many problems with shoes because of my flat feet and my skinny ankle causing my foot to constantly slide forward.  I have none of these problems with this shoe.  I didn't feel any discomfort walking in them.  I can't really say if they actually do make you more toned as I work out regularly so it's hard to tell.  But even if they don't, they are worth it for the comfort aspect alone.  I don't think I'll ever wear a regular tennis shoe again as long as these are available.