JonnyO wrote a review of Big Agnes Fish Hawk Sleeping Bag: 30 Degree Down on August 12, 2008
I really like the design. It is roomy like a rectangular bag and keeps the pad (I am using a Big Agnes foam pad) underneath me the entire night. I have not been out in really cold weather and the bag has really been too warm for me so far but opening the zippers at both ends seems to do the trick. I was in 50s last weekend and was able to be pretty comfortable.
Being down, this bag can pack down pretty small if you want to take it backpacking.
It comes in two sizes, regular and long and I believe Big Agnes is the only maker of sleeping pads that fit the long which I have. On the plus side, the Big Agnes Two Track pad is comfy enough for me plus has a good insulating value (not that I need it). For the regular size, you have a wider choice of pad.
I am a happy camper!