Well, I've been looking around for some hydraulic disc brakes, and am wondering if I should get a pair of Shimano XT hydraulics. I have a few questions regarding the brakes that I hope can be answered...are the XT discs an open system? Is there any type of piston retraction device as advertised by the Hayes brakes? Are these brakes ones that you can modulate the stopping power, or are they simply on/off? And lastly, what is your overall impression on these brakes? How would they fare for a person that likes to mainly freeride and xc?
edit: I feel stupid for spelling "questions" as "qeestions" on the subject line.