I'll start off by saying I'm a big Stoic fan, but I would NOT buy this bag for the full $300, I got it on sale and paid under $200, which I think is a fair value for this bag.
As far as pros:
- Crazy light
- Extremely Compressible(see photo)
- Cheap for an 850 down bag(for me at least)
- Water resistant Pertex shell
Now that what I love is out of the way, you should know what you're getting. The 30 degree rating is pretty misleading to me. I spent a 40 degree night in northern MN, with a silk liner that should add about 10 degrees, and I was a little chilly. Now I was sleeping on an Inertia Xframe pad, which dont exactly insulate but use the bag's own insulation, so that may have contributed. I was also wearing a lightweight merino wool baselayer. So plan on wearing an extra layer at night if you're going to be in colder temps. (My buddy has the same bag and wore an extra layer that night and he said he was perfectly warm) But honestly, with such a lightweight bag that's expected.
I didnt have any problems with the zipper hitting me in the face, there's a piece of fabric that you're supposed to tuck the zipper under and it keeps it off your face just fine. I also wish the included stuff sack would be a little more water resistant considering it's a down bag and all. I upgraded to a compression dry bag because I'd rather be safe than risk a soggy sack of feathers at the end of a long day.
In conclusion, if you're looking for a lightweight, ultra packable, cost effective down bag, this is your bag. Just keep in mind that it's not quite as warm as advertised and you'll be totally satisfied. I know I am!