What do you guys think of the automatic/manual inflatable PFDs for use on the Ultimate 20? I am thinking of purchasing 3 Onyx auto/manual inflatable PFDs to keep on the boat for racing. These particular PFD's are pretty lightweight, relatively inobtrusive, and are a universal fit.
However, it doesn't look like most people racing on keelboats are using the inflatables, choosing instead to use a low profile vest (extrasport, zhik, etc.).
Does anybody have experience with these PFDs and an opinion on what the better option is?