I run a set of PD-M324s, it is a very rare occasion that I end up flipping them. More often than not when I unclip, the pedal remains in the correct orientation so I can just step right back in.

I am very happy with these pedals, although they are my first pair of clipless pedals so I may not be the best reviewer. I am a commuter and I ride with either mountain bike shoes or keen commuters so I can do some walking after I am off the bike, but if I am going to a friends house or out to the bar or some other more casual type gathering I have had a pretty easy time of riding in my flip flops. I ride a cross-check by the way.