J Icetonwrote a review of MontBell Plasma 1000 Down Jacket - Men's on March 8, 2014
Familiarity: I've put it through the wringer
Fit: Runs small
After 3 months, I switched to a Marmot Quasar. The Plasma's quilting doesn't keep the down evenly distributed, and I'll eat 3oz for even warmth (and more of it) and insulated pockets (which means integrated stuff sack too).
Can't beat the Plasma for packed size, though.
And as for sizing, I usually wear a small, but a medium in this.