I am currently riding on SPDs because the hills here are insane and sometimes I have to stop on them. I almost slipped putting my foot down with my LOOK pedals so I switched them out. However, for long rides, I prefer the LOOKs because they don't give me hot spots and I just feel like I have more power with them? Prolly in my head but I like them aside of the slipping thing. I did start out on them so maybe it's just what I got used to? I'd say if you don't have killer hills that you have to stop on a lot, try some LOOKs.