I am using M540 pedals set to the minimum tension. They are pretty easy to get out of that way and I have never had them release accidentally on me. I have never used any other clipless pedals and I have only used these for a few months so I am a relative newbie. I believe Shimano makes a multi-release angle cleat for them. I am using the standard cleat that comes with the pedals. I've had my foot get trapped on Powergrip pedals a couple of times. So far I have always been able to yank my foot free on these when I forget to unclip early enough.

Ken