I love this bag. Lying on my thermarest wrapped in this bag I was so cozy and comfy it felt like my home orthopedic mattress. The downside is that if the weather is warmer than expected the front zipper has less ventilation options than the traditional side zipper bags which can be vented from the bottom or the top. However the front zipper means you can sleep with arms out of the bag. You can also fold down the mummy hood for a pillow. But in cold weather you will be so warm and cozy in this... fluffy lofty bag--it is 800 fill perfection. I love this bag!!!
Used this sleeping bag in Feb-March in Nepal with temps around sub-zero fahrenheit for tea house trekking to Everest Base Camp along with Gokyo Region. Awesome, warm bag that fulfilled all my expectations. The only other would be how small it packs down, I wish it would pack down just a little smaller to not take up so much room in my pack, otherwise it's an awesome sleeping bag for extreme cold temps.
If you're ready for an outdoor winter camping adventure, The North Face Inferno 0F Down Bag has all the features you need to keep you comfy and warm while you sleep in the cold outdoors. Engineered with 850 fill goose down, the Inferno 0F Down Bag has an advanced bomber, waterproof Pertex Endurance shell that keeps you from getting or staying wet when it's frigid outside. Featuring an ergonomic heat trap and a vaulted footbox, the side block chevron baffles make sure your down stays put and resists matting. Additionally, the stuff sack doubles as a summit pack.