I would wear this everyday...
If I could get away with it...It's so light and comfy it seems crazy that it keeps me as warm as it does. It is the perfect length in the torso and also the sleeves -- long enough to keep the chill out, but not so long it starts bunching up.
After wearing it a few days, you can hardly tell it's stretched out at all...
I've worn it on a couple hikes and it was perfect over a tank in the February chill of the NW. Coupled with my Marmot Flair Fleece, I needed nothing else at the top.
Buy it, you will love it.