Another big Froggie fan here! Love the lack of spring tension and the float. Clipping in or out is never a problem.

Frogs can be used with road shoes. Here is a link to the Frog Instructions, scroll down to the last page and you'll find the compatibility guide. Frogs are compatible with all road shoes with SPD-style 2-slot installation configurations.

That said, I use mountain shoes with my road bike too. I'm not a racer, and I like being able to walk somewhat normally when I get off the bike at rest stops and such.