Cody Wwrote a review of Rab Microlight Down Jacket - Men's on October 12, 2017
Familiarity: I've used it once or twice and have initial impressions
I originally bought a Large based on the reviews, but BC actually ended up sending me a Medium. It was a blessing in disguise as the chest and shoulders fit great throughout, but I do agree with other reviewers that the hem is fairly snug around the waist.
I used the jacket for a recent trip to Banff where it was in the 30's throughout the trip. With just a baselayer and jacket I was more than comfortable hiking and standing around taking in Canada's beauty.
The only down side is that I noticed a couple spots near the inside seams where some feathers were leaking already.