Rating: 5 / 5
Purchased in spring 2010.
This has been an awesome sleeping bag. I typically use it as a quilt and then get in mummy style only when it gets colder.
I have taken it down to (estimated) 25-28F in a breezy pass:
* inside a Titanium Goat Raven bivy (light, breathable)
* on a XS thermarest prolite (torso) and half a Z-rest (legs),
* wearing medium weight wool socks, thin silk long underwear bottoms, medium-weight fleece pants, Ibex woolies shirt, Patagonia R1 hoody.
* fueled by a fat and protein-rich dinner
I was toasty warm and had to vent some throughout the night to avoid sweating.
The smaller sizing vis-a-vis conventional American bag sizes (5'10" reg vs. 6' reg, 6'4" long vs 6'6" long) is good for those of us halfway between the American sizes... (I'm 6 and change. A regular is too short, but my old REI and Kelty longs had more spare than I needed.
I find that due to use in quilt layout, the down tends to shift away from the "hinge" of the bag, but it's easy to fluff it back into a more uniform distribution.
My single pedantic complaint should illuminate my level of satisfaction...
The cords for adjusting the hood are not different shapes as in some of my other bags, so I have to test pulling each one to find which is top and bottom to adjust one independently of the other. Who cares.