The PD-M540 is shimano's all-mtn clip in pedal. It has worked w/o problems on my hardtail K2 for over 7 years. I do tune the settings depending on the type of riding I am expecting, but those adjustments are easy and quick. The pedal is easy to clean (I used this set-up primarily in the muddy woods of PA & VT) which I love, and it hasn't pre-ejected me in a tight spot. Although there are fancier, lighter-weight stuff out there, the PD-M540 and Egg beaters are still my basics and my favorites.