I have but it's been a long time - 10 years maybe.

NOBODY ever had more difficulty getting acclimated to using clipless pedals than me. I'd do OK getting them set up and at the start of a ride but, at the end of a ride when I was starting to tire, my foot would bind up, I'd panic, and over I'd go.

My son turned me on to genuine Shimano SPDs and the silver, multi-release cleats. It was like turning on the light switch. That's the only thing I've used since. The multi-release cleat made such a difference for me that I've been afraid to try anything else.

I didn't realize that I had funny feet until I started setting up clipless pedals for other people. If I stand normally, my heels form a 90 degree angle and my toes point 45 degrees in each direction. Cross country skiing required, for me, constant attention to keep my toes pointing straight. The outside heel edges on my shoes wear down quickly. I'm thinking that my feet tend to roll to the outside (supernate) and that makes most cleats bind up and not release as easily.