Co2 inflatable life jackets

I've got a problem with my legs that makes wading a little unstable a
times. I use a wading stick for stability but sometimes I am concerned
about falling. I have read about the small Mustang (or similar) vests
that inflate if you get submereged. I was thinking about one for that
just in case moment. They look like they would not interfere with
casting.
The water that I wade is not too deep ore fast but has some holes etc
like most rivers in Michigan. Anyone used one of these vests for
wading or any other thoughts?