I looked at both the jacket and pullover. I ended up with the pullover because I already carry a lightweight nylon windjacket w/ full zip.
Also, I won't have to worry about zipper failure w/ the pullover--which I doubt--I'll be using except in worst conditions.
I found that it accomodated the micropuff vest along with 2 shirts and a nylon coat w/o feeling uncomfortable or pinched.
It is an expensive item at $230 but the welded seams, 6.5oz, small pack size, and solid cut seem to make it standout...
With all that, I have yet to go through anything torrential in it--but needless to say--I'm more than confident in the product even if I had to pay double what some other shells cost. But then again this is how we save 3-8ozs over other waterproof layers. So I'd go this or a trashbag honestly. No sense in a 1lb raincoat/sauna for backpacking.
p.s.-marmot has great gear also but I ended up returning my precip for the specter...