Hope Mono Minis on current bike are brilliant, set up and forget, look great. Very slightly underpowered for biggish blokes on big Scottish/alpine descents
XT's on previous bike good but rather soft lever feel for me, and more sticky piston problems than the Hopes.
Hayes Stroker on a demo bike were the worst I've ever used - totally on/off
Reckon you can't go wrong with Hope or Shimano, Avids seem to have quite a few problems, Hayes rubbish, Formula good but too few out there to tell

