these brakes are the sh*t! i just tested some out and couldn't believe the awesome stopping power and control! plus, they look really cool! like something out of a sci fi movie or something. and they're supposedly a half pound lighter than the xt setup. i can't wait until they go into production, but I hear they're going to be way expensive, like $600 for the full setup, but hey, don't the best things usually cost the most?