Emily G.wrote a review of Big Agnes Encampment Sleeping Bag: 15 Degree Synthetic on March 22, 2012
I camped in 30-40 degree Patagonia weather, and I was very cold in this bag. The Big Agnes sleeping pad also did not withstand the elements. It had a hole in it (that I could never find!) only after using it on a handful of trips.
The wind in Patagonia was powerful; however, I do not believe the wind contributed to my coldness in this bag because I slept in a great, new 3-season tent (Big Agnes Lynx Pass - I do recommend this Big Agnes tent).
Unfortunately, I'm returning this sleeping bag and the pad.