I have used this bag for about ten years and its still going strong! Unfortunately REI does not make this bag any more, but if you see one for sale on ebay, craigslist etc then grab it!
This is a zero degree rated bag, its goose down, its light and it packs small. If you have read any of my other posts you well know I prefer a rectangular bag as I like to move around in my sleep. This bag though is roomy, and when I am credit card touring I throw this on my bike as well as a bivy bag. There have been times when this combo has made for an enjoyable night rather than freezing my butt off.
REI, in my opinion makes very durable gear and in all the time I have used this bag I have not had a single issue. The zip still works perfectly, its not torn and it does not leak feathers!
Its temperature rating of zero is about right and I find if i wear light thermals I get a great nights sleep (and I tend to sleep cold).
Packs small and light.
Accurate temperature rating.
Durable and well made.
No longer made.