I also like my OR Ion, which I also purchased from the REI outlet, but I have to dissagree on the hood.
I have what is by most accounts a large head, but this hood is huge, and the closure is funky.
I would rather have a regular sweatshirt-like hood draw string (like micropore, rainsield, etc.)
Having the drawstring across the back of the head means sleeping with the hood on can be uncomfortable.
Otherwise, I'm a fan, and I can layer mine over a synthetic-fill hooded REI Gossamer, and a Golite down vest.