I used the sleeping bag on a short backpacking trip in May. Although I'm not entirely confident I'd be comfortable at 20 degrees F--it's rating--I was quite warm at 45 (which is also pretty cold), especially fully zipped and in a pair of long underwear. Also notably, I'm six feet tall and fit well in the bag. The measurements are spot on. On the whole, I think it's a great buy for the price.
This review was written in the old system and had content requirements that are different than reviews written today.