depends what you plan to to with them and waht kinds of straps you get...same thing with the clipless : there is crap and there is quality (really!).

Good straps will never come off no matter what, unless you're an idiot who cannot set his straps right.

The ONLY clipless pedal I can trust (on the track) is the Speedplay zero Track version. All other don't do. I come out of clipless pedal every standing starts I do. Almost.

I have a Mesenger friend who uses mountain bike clipless pedals. He can walk and bike with the same shoes. But He doesn't pull on them on standing starts!