Let me preface this by saying, I worked on a Fire Boat for many years and had private business teaching boat operations for decades. I am very familiar with water emergencies.
Last season one of my partners had a very close call while taking a dive out of my boat. He was not familiar with the low sides of my `14' Duck Hunter and while throwing out decoys he took a swim. As I turned, all I saw were the bottom of his boots as he entered the water. I personally have invested in the Mustang HIT lifejackets and require all my crew to wear a PFD until we get the boat set and blind up. He followed my lead and purchased a Mustang HIT also. I hunt on the Lower Columbia where we border a rain forest definition, so the dissolvable pill autos don't last.
In this experience I have lost some confidence in Inflatable vests!
Due to the angled sides of my DH, he hit the water headfirst. As advertised the auto inflate was supposed deploy in inches of water pressure. He surfaced in a panic struggling to stay afloat with all his gear on. As he struggled with his head above the water the vest failed to deploy. Thanks to the man upstairs: I just happened to be on the "pole" as we were setting out decoys and I had chosen to bring my long pole that day!
He was within reach!
As I reached out with the pole, he grabbed it, and I began to pull him to the boat. In the process the vest deployed. The problem that developed was that with all new clothing gear that goes up around your neck and a few too many cheeseburgers, the vest first started to choke him. Whether it was him or the fit it slipped over his head. Mind you it was still connected to him but with a PFD hanging to the side you have to struggle to keep your head above water. Again, I had him on the pole and got him to the boat, but he was unable to board. Thank god again, I had an electric start motor and got him over to shallows.
Since I primarily hunt by myself, I am moving away from the inflatable vests. I have heard stories of them popping off or choking the wearer, on this occasion, I had a front row seat! I have went back to my regular vests especially when I am alone. Especially if you are built like an offensive tackle, I highly recommend re-thinking the inflatables.