Will make your day!
Great cold weather piece. I'm 5'11" 170 lbs and the medium is great. The fit IS roomy, but it makes sense when you are throwing it over all your other layers.
I put it on when ski mountaineering to conserve warmth when I stop for lunch/anytime, or when belaying a partner in cold weather. Will keep you warm even when wet, as advertised... so clutch! The inner pockets are great to dry out gear or allow your food to rehydrate in the cold, and it makes a nice pillow at night.
Once you've relied on it you'll kick yourself for not getting one sooner!