I've been riding a Specialized road shoes/Keo pedals combo for approximately two years. It's my first experience with clipless pedals. One caution: the more that you've ridden with rat trap pedals, the more you've probably wired in slightly lifting the foot that you want to put down when you stop. Just feels better than dragging the foot across the pedal. But if you do that when trying to unclip from Keos, it won't work. To unclip, think "down and out." Put just a little down pressure on the pedal, then snap your heel per the included directions. Works every time.
It'd be a good idea to practice unclipping a couple/three times at the beginning of each ride. You need to wire the unclipping into your brain, because if you're startled, you'll tend to go back into rat trap mode.
If you haven't used clipless before, it'd be a good idea to do your first practicing where you can lean up against a wall.
You might want to take a scredriver with you, in case the cleats loosen up. (It took mine a week of rides to stabilize.)
Last edited by FogVilleLad; 09-28-09 at 01:22 AM.