After 40 years,I still stick with the stoploss traps.I have at one time or another,tried most everything.Jumps, regular longsprings,and coilsprings ,do work well--but--deep water must be right at hand ,with no interfering vegetation.This just isn't available in a good muskrat marsh.While water depths may be more than sufficient--so is the vegetation that stops a rat from deep sixing.That is why I rely on the stoploss traps.
When I was young,I had a lake with mainly bank rats in it.I used #1 longsprings in the den entrances,water depths were sufficient and no vegetation to hang up on--traps worked like a charm.
The areas I have trapped for the last 3 plus decades ,are not like that--thus my reliance on a different trap.
Tom Olson