I ordered the Drifter online in a L/XL and it fits great (6'1", 205lbs). The wide range of straps from the sounders, to the chest to almost the wait make it possible to fit in on most anyone.
The two main pockets were why I ordered it, room enough of my iPhone 5s in a waterproof case on one side, and granola bars and whistle in the other.
It feels a bit on the bulky side when picking it up, but when paddling in it I don't feel it at all. It's always out of the way for my chest, and hasn't touched anything on the back side either.
My one gripe is that the first moderate paddle I took it on, the bottom buckle was either poorly designed, or not adjusted correctly, and literally wore a hole through my happy trail and skin, giving me a bit of a fabric burn.
Over all, great jacket with just the right amount of features to keep close at hand what you need.