Nick wrote a review of MontBell U.L. Super Spiral Hugger #0 Down Sleeping Bag: 0 Degree on January 3, 2014
Familiarity: I've put it through the wringer
Great bag. the stretch makes it more roomy than my 30deg marmot. Slept in 10 deg with a pad with no issues. The stretchy twists are my only concern with them most likely weaking their stretchiness over time.