I had been using Frogs and love them. What I don't love is having to put on special shoes every time I want to ride the bike. I have ridden with the Frogs in regular shoes, and it's doable but awkward, uncomfortable and unsafe.
Since the bicycle portion of my commute is short (bike / train / bike) I decided to put on a pair of MKS Touring pedals and ride in regular shoes (no clips & straps either). It's pretty liberating, and at least for my short commute I don't find any performance difference (but I'm not a fast rider).
So, I'll keep the Frogs and put them on for longer weekend rides, but leave the MKS pedals on for the short commute rides.
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San Francisco, California