I switched to clipless from powergrips. I love my powergrips. But now that I"m used to the clipless, I think they're head/shoulders above platforms. I'm not exactly saving a lot of time, but I'm saving effort. Or at least getting better output with the input I'm putting in. I can totally tell the difference especially on the ride home with the hill climbs. My pedals have a platform side (saved my @ss today) and I've ridden quite a bit on just the platforms and there is definitely a distinct advantage to the clipless. I also tested the powergrips against the clipless and it saddened me to give the nod to clipless.

But to try and stay on topic in my own thread.... the downside to clipless is the inherent and present danger of not being able to get clipped out. This is my 2nd fall this week. 1st was on Wed. when my chain fell off and was down around the bottom of my crank arm on a descent. That one was just plain inexperience on multi-tasking dealing with equipment failure.