I have them on my SS road bike commuter. Couldn't get up the big hill without them. Ok, maybe I could do it with toe clips or clipless pedals too. Anyway, I like the Power Grips. Only thing I can say against them is that you pretty much have to adjust them for one size of shoes. If you adjust them for your big fat skateboard shoes, then they are too loose when used with skinnier shoes.

I had some trouble at first getting my feet into the straps when starting from a stoplight. I'm pretty good at it now.

They are easy to get out of in an emergency. I still don't think I'll use them this winter. If my bike goes down fast on ice, I don't want to be attached. In late fall, I'll put on a smaller chainring and take off the power grips.