I purchased these shoes online last week.  I wore them all around Knoebel's Amusement Park the following Saturday and on Sunday I noticed my legs were tired.  Not the bad "I stayed up all night drinking and now I have to go function in the real world" tired, the "I actually think I might have gotten some exercize" tired.  I am already noticing a small but positive difference.  I do want to clear a few things up about the shoes.
1.  I'm not a heavy duty exerciser.  I go to the gym twice a week (sometimes) and I am on my feet a lot during the day (thanks, employment!).
2.  I chose these shoes as an addition to my fitness routine (which is admittedly lacking, I think you'll agree).
3.  These are not miracle weightloss toning shoes.
4.  If your feet/toes are going numb while you wear these, its more likely that they are the wrong size or are laced too tightly, not because its a bad shoe.
5.  If your knees are sore after wearing them, that's a personal problem, not a shoe review.
6.  If you have knee problems, and buy this shoe, and it appears to exacerbate them, that's pertinent information.  People with knee problems should look at the negative reviews.
7.  For all other inquiries, press 9 now.

Oh, just kidding about the last one.

Anyways, for all average people (averagely shaped, averagely working out average) this shoe is a good purchase.  It shows the results I expected and doesn't hurt any part of my walking apparatuses (apparati?). I am very please with it, and I would recommend it to other people (even ones I like).