If you don't already wear MBT shoes then it's a little hard to convince you to try them. I choose them to help my achilles and to stress my feet a little bit. Yes, stress, because that's what working out is.
The other reviewer is correct: these shoes will make you wobble. They are designed for you to have some instability, so you auto-correct and (supposedly) burn more calories. Maybe true, maybe not, but my legs get a little bit more work and that helps. Second, you can rock on these shoes back into your heels and get a really good stretch in the achilles. And, well, that really helps me.
Now, if you stand on your feet all day: sales or, say, wait staff, or if you need stability when you stand, then these shoes aren't for you. But for a desk jockey, they'll make your legs work a little harder when you walk to the water cooler or coffee machine and you can flex your feet/legs when sitting in front of a computer all day.
They are a great walking shoe but not good for other sports. They aren't really a flashy shoes, but functional and just above business casual.
From having friends try them, about 10%-15% of folks just can't get used to them. But I have a whole collection of tennis shoes that I couldn't get used to, so that's not an unusual result.
Bottom line: I like them and I hope that they work for you, also.