I switched to MTB with SPD clipless and I really like them. I have Shimano M087 shoes and Shimano M540 pedals

http://www.nashbar.com/bikes/Product...04_-1___202526

http://www.nashbar.com/bikes/Product...73_-1___202530

When I first switched to clipless I used Platform/clipless and after I figured out That I could still pedal when not clipped in I switched to the dual sided pedals I have now. I not one of these guys that think everybody should switch but these shoes aren't too bad to walk in. I had a 2 mile walk of shame in them after I crashed in Florida without problems. In stop and go traffic I don't worry about getting clipped in but often my foot just goes right to that sweet spot. I don't think about my feet when riding and popping up to ride out of the saddle is just so easy now. Before clipless I used to worry about my feet slipping. I most always unclip my left foot and I'd suggest anyone that is considering switching to start standardizing how you stop. Do the same things in the same order. So am I faster because of clipless? I don't know. I'm not very fast anyhow.