This is an amazing backpacking bag. Very warm for the weight with great comfort and quality. I am a warm sleeper but the 20 degree rating seems correct or even warmer. I woke up a few mornings closer to 10 degrees and was cold but not freezing. This is the 3rd bag I have purchased in the last 2 years trying to find the best combo of packability, warmth, and weight. This exceeds all of my expectations and will be in my pack for many years.
Bonus it is from a Colorado city not far from where I hunt.