I used SPuDs with al three 'bents I used to own- a Vision CWB and V40 and a Rans V^2. My feeling was that foot problems came from *not* using some sort of clipless system when pedaling a high-bottom bracket bike. Doing that forces the rider to push on the pedals constantly to keep from slipping off. With a clipless system you can relax and even pull on the pedals if you like. Result: No pain.

I quit riding 'bents a few years ago, but I've been tempted lately to get one again just for touring.