first pair of MBT

I just bought my first pair about two weeks ago and love them too! I have the MBT Walks in black. I hestitated because of the price and the odd look, but now I'd love to get a second pair!

I'm seriously feeling the burn. Not sure if my legs have toned up, but it feels like I'm getting a workout. I live in New York and try to walk home from work in them which is about 1.75 miles. But I have to take MBT "rest" days every once in a while and go back to regular shoes, hopefully I can work up to wearing them every day.
 
I was wondering about these! The only thing that prevented me from buying a pair was their style! I don't understand why they don't just do street style shoes - like pumas, or adidas ones.

Do they really work? Is it hard work to walk around? I'd love to know more about them!