Exactly what I needed this winter in New England. I looked around for something with an athletic fit that I could wear by itself around the city during the work week, and layer under technical gear on the weekends. I took a chance with MontBell's Ultralight, and it turned out to be just the ticket. I've been wearing it with layered merino wool down to about -20 C so far, and my torso has stayed satisfyingly toasty on my mile-long walk to work along the blustery Boston waterfront. I look forward to putting it to the test up in the White Mountains.
The hood is a bit voluminous (obviously meant to contain a puffy hat or helmet), and on milder days I sort of wish I could detach it, but it's so light that it's hardly noticeable behind my head. The drawstrings can pull it in a good deal anyway.
Aesthetically, I appreciate that it's one of the few down jackets without an ostentatious logo plastered on the chest. Just a clean, subtle logotype near the waist.
I'm 5'6", and the small fits me perfectly.