I think the problem with some of the current push away systems is that the CL separates from the bar.. so you loose the CL and you are out of luck for the rest of the day.

There are a few though that only release one side of the CL hoop, which I think is the way to go

As far as I could tell though almost all of the push away systems are easy to reset in the water... but thats not a real big deal if the things doesn't constantly get released accidentally.