Those Nashbar pedals have the same idea as the Shimano A530 that I love. It's almost too nice to be able just jump on the bike to the corner store and back with any shoes laying around and not worry about clips and straps screwing them up.

I just ordered (not here yet) some M520s that are double SPD and come with a plastic platform that "clips" in when you want it. They were quite a bit, relatively so, than the A530s.

If they don't work so well, I might try the Problem Solvers platform on them. I guess I could sell them with the pedals and buy some more A530s if all else fails!!