I have been using the MBT sneakers (mine are black in color) for several months, off and on. Overall my impression is favorable. You will feel taller by an inch or two, FYI... but that is usually a good thing! I guess the idea is that you are constantly balancing yourself, and hence working out your legs, because the sole is rounded/curved, but after a while you just get used to it. The shoes do feel a tad heavy, but again that becomes less noticeable the longer you wear them. I give these a thumbs up for now, but need more testing time to give a final recommendation/review. (Note: they say your posture becomes better by using these shoes, and I agree.)

I just bought my first pair of MBTs. And they rock...literally! These shoes "engage your core muscles" by forcing you to roll your foot with each step. I've owned them 4 hours now and haven't taken them off (bought them from www.blissspa.com on sale). I expect to wake up 5 pounds lighter. Ok - that may be a little lofty a goal, but I am expecting them to shape up to shape me up. Will have to get back to you on that. Regardless, if you want to try them out, now is the time since they don't cheap and they're now on sale! (via blissspa.com)

I bought a pair and they are great. (via mbt shoes)