Haven't gone clipless yet - I started using Power Grips two years ago and really like them. They may not give me quite as much power as clipless, but they're miles better than toe cages. Also they give me more "play" for my bad knees, so that's another plus.

My sister also became a convert to Power Grips, and just found out that my brother uses them on his commuting bike, too.

My new "Cinders" has Power Grips installed as well.