Ok, so this seems fairly superficial given what's going on economy and all, but I want to hear about your MBT shoes. I have seen these around for a while (in Bliss catalogue especially) and been curious. Are they comfortable? Do they "better your balance, improve posture, stimulate circulation and tone muscles from head to toe" as claimed? Also, do you walk funny in them? i.e. are others able to tell you have on 'special' shoes. Are they worth the price? Oh, and how do they run size-wise? True to size, big or small? Thanks!