Got my Stohlquist Brik yesterday and tried it out today.
I have a 39" chest and their medium size PFD is a nice snug fit for me.
It was, however, too small for my friend who was looking into buying the same thing.Think he said his chest was either 41 or 42 inches, so you might want to go with a "large" if you are his size.
The brik didn't get in my way when paddling and kept me afloat (while my friend fished me out of the water. Thx Mike).
The non-slip panels make it hard to wear the thing (because it pulls your GD hair out) -- but holds the vest in place when you really need it to.
Couldn't be happier with this PFD.