Rob Wykoffwrote a review of The North Face Immaculator Hooded Down Parka - Men's on December 31, 2016
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
The North Face Immaculator down parka is a super warm and super light down jacket that blends the line between highly technical and extremely versatile. The Immaculator is stuffed with 800 fill goose down - remember, higher fill number = higher warmth-to-weight ratio. The average down jacket is probably stuffed with 500~ fill power down... if the Immaculator was filled with 500 fill power down, you would need to stuff 38% more feathers into it in order to get the same warmth as the 800 fill power. 38% more feathers equates to at least 38% more weight, so that is why the Immaculator Parka's 800 fill power goose down gives it such a high warmth-to-weight ratio.
Since it's warm, comfortable and light, you just might find yourself wearing a lot, and that's a good thing. It's as comfortable walking the dog as it is belaying from a high alpine shelf, and doesn't mind being stuffed into your pack (higher fill down, is also more compressible).
As some people have noted, this jacket is Relaxed Fit, so it's perfect for accommodating layers - if you are looking for a more technical fit, you may want to size down.