This is a serious piece of kit. The water resistance and insulation of the limestone neoprene is impressive. Super warm, flexible, and keeps you dry. It also dries off very quickly after getting wet. I like the idea of having a top-only "wetsuit" just to keep the core warm and dry. The stitching and zipper and very robust and I can't see any weak points anywhere.
This is an athletic fit, designed to hug your anatomy like a wetsuit so if you're carrying some extra lbs consider a size up or use this is as motivation to get those lbs off.