Felixwrote a review of Marmot Sawtooth Sleeping Bag: 15 Degree Down on September 15, 2016
Familiarity: I've used it several times
An absolute must have for dry temps, the down is extremely warm and compressible, Great for dry conditions - keep in mind it won't hold up as well as a synthetic in humid/wet climates.
Being lightweight and compact makes it super useful for camping and backpacking.
So worth it