At work we have Mustangs and have worn them quite a bit with zero problems or accidental inflations. Being a tight wad and not wanting to spend that much I have had my sone pick me up a BPS version , while it seems comfortable at first glance I have not had it out on the water yet. I did read a lot of reports about inflation while in compartments or while installing the CO2 cartridge. Since I have screwed the cartridge in yet I can complain. However I do know the Mustangs I have worn are great, you quickly forget you are wearing it, (we aren't fishing so that might make a difference), you also don't want it too tight on you, when it inflates you think it's gonna pinch your head off if you don't leave some room.