Danielle Brachman wrote a review of Mountain Hardwear Megalamina 20 Sleeping Bag: 20 Degree Synthetic on October 7, 2012
Familiarity: I've used it several times
My wife and I used this bag up in the Rockies. It worked great since we had weather from 50's to mid 30's. We plan on getting a sleeping bag liner which should lower the rating of the bag another 10 degrees.
We suggest sleeping with the bag up-side-down so you can use the pillow rest to trap the air from coming in around your neck.