Anyone use one? I actually own one and have mixed feelings, I wouldn't have paid full price for it but I had REI dividends plus a 20 percent off coupon burning a hole in my pocket last year so I got it. I'm really happy with the price I paid so that's a plus. But non the less I think it's more of a summer bag than anything. It's rated 18 lower limit and 30 comfort I believe. I've only used it a hand full of times and that seems about right...anyone else have experience with one? I might use it for backpacking next month but I'm afraid to try out a new piece of kit on a two night trip where my vehicle is half a days hike away, haha. I'll be by the central California coast so fog, wind and humidity give high 20s to even low 40 degree weather a nice finger/toe numbing bite. The sucky part is no fires to cook or warm up with right now : / Before I got incredibly side tracked I guess my main question should have been, anyone have a 30ish degree down bag and successfully used a SOL escape bivy inside or outside the bag to increase it's warmth? How did that work out? I might bring a good ol green army wool blanket for added protection too. Thanks for any input it suggestions!