Mike:
I have a William Joseph waist pack that I bought with a gift certificate.
I generally like it, but find that it can serve as a tangle magnet for my fly line. I typically use it for striper fishing in the salt so the excess wind and the rolling surf on the coast may be part of that particular problem.
It does do a good job of allowing me to be minimal with what I carry and stll leave room for a few other things "just in case".
When I trout fish I do prefer the vest in a big way.