I have m540s on my road bike. They are really easy to get out of. I've had my feet pop out on their own in emergency situations. I tried them on my fixed, and while they were fine on the track because you don't backpedal much, I didn't like them on the street. The main reason being my foot popping out of the pedal when I was trying to backpedal to stop. This was at the hardest setting too.. Luckily I use a front brake, so I didn't slam into the car that was stopping in front of me. I think road pedals are better for fixed gear bikes if you don't want to stick with the clips/straps.