I'm running the '04 XT's and find them trouble free once they are fully bled. In fact they are too much as a front so I've been running resin pads to get more modulation and save my last solid collar bone. They are only 160mm and stop like Hayes 8's, really amazing power for a 3/4 inch throw lever. On the negative side is all the parts and pieces you need to install them plus needing the new 765 hubs... all in all it was worth the effort. Even running metallic pads in the rear they are death silent and growling nicely while stopping. Let me know if you have other questions.