Temperature rating is likely fairly accurate. I am a cold sleeper and can use it around freezing. Packs nice and small. Length seems to run a little on the small size. If you are close to the upper end consider getting the next size up.
Only down side is the 3/4 zip, which makes it slightly less comfortable to use when the weather warms up.
This review was written in the old system and had content requirements that are different than reviews written today.