Super Shoes? Or Not?

I've been battling with the idea of buying shoes that help tone your legs, butt, and thighs. On the surface it sounds outstanding! I have to wonder though... do these shoes actually work or are they just a clever marketing scheme that has us memorized? (see ad below)


As far as I know, it all started with Sketchers Shape Ups (about $100). They look a bit clunky, but I figured it was okay to be clunky if it was going to help my butt!

Then, it seems like every other shoe company released their own version of this shoe. Now we have the Reebok Easy Tone (also $100 - still look a bit strange) and tons of less popular off-brands. Kmart stocks toning shoes very similar to the Sketcher shoe, but they only cost $35. Today, I saw a actual tennis shoe looking version at Payless for $30.

I want to buy into this super-shoe deal, but I don't know. If anyone has purchased this type of shoe... has it worked? Have you noticed a difference? Do your legs, butt, and/or thighs look more toned? (Sorry if that's too personal) Please help me before I make a mistake!