shoes with rounded soles? on Rachel Ray

Have any of you tried these new shoes with the rounded soals that throws your balance off so you are constanty using your muscles. They are supposed to build your butt and thighs and tighten you stomach. Thought I would try them. They had them on Rachel Ray today and people swear by them! Just thought I would get some of your opinions!

I heard they are fabulous. I tried a pair but couldn't walk in them, so I didn't buy them ($250) but I understand that the Avon sneakers with the similar soles are good, so at under $50, I might try those and if they are really good, I might spring for the MBTs. I hope that helps at least a little...sorry if I can't really give you first hand recommendation. Anita

Not sure which ones those are - I have MBT's and love them!

I was blessed w/ a big foot (size 11!) so I'm not one to try trendy shoes. For me, it's all about comfort.....I'll have to get my exercise in some other way!! - Ann