Where I use this Jacket.
When I snowshoe in -25C Northern Alberta winters.
Sure you sweat like hell when you carry your pack but the great thing about a synthetic is that once you get to your destination the moisture forms a frost on the exterior that can be brushed off and the jacket is magically dry!
I do however carry a severe weather down jacket that usually ends up as a pillow and to keep my contact solution warm in the tent but thats about it!
I used to be into down for high output activities but went back to synthetics like this because nothing seems to compare. If it gets wet, it dries within 30 minutes of getting the camp fire going.
How I layer this jacket:
A thin base layer followed by a whool sweater and then the jacket. Thats it! -25C night with a campfire. simple and effective!