I wore this jacket on Rainier and LOVED it! It was 5 degrees with 15-25 mph winds and when I threw it on during breaks, I warmed up really quickly. It's very warm - when I hiked in it, I had to unzip partway to cool off! The hood fit nicely over my helmet and it's fairly easy to fiddle with the hood and zippers with gloves on. It's sized with some room to layer - I am 5'2" / 105 lbs and with the XS, I layered three base layers and a fleece/softshell layer underneath and still had pretty good movement. The fit is also nice (not as ridiculously puffy looking as other options), especially for the fill and weight. Cons: I wish it compressed smaller and had a bottom zip for ease of accessing my harness.

I wore this jacket on Summit Day on my Kilimanjaro trip three weeks ago, and have absolutely no complaints. The jacket was light, warm, and offered excellent movement. As the previous reviewer noted, the fact that the jacket packs in its own stuff sack is a nice extra.

I moved to Minnesota from arizona... and was scared of winters below zero. So I bought this jacket hoping it would keep my "always freezing" body warm in subzero temperatures. The result? I was absolutely shocked at how fast it literally heated me up! I have actually had to get a lighter jacket... because It was too much if it was above zero! And the best part... this warm cozy puffy jacket packs in its own bag... about 8inx8inx8in... and weighs practically nothing... it is superbly the best jacket ever! my other favorite feature is the hood... just as warm as the rest of the jacket as it too if filled with the most phenomenal quality down ever!