I have used this bag on canoeing and backpacking trips where weight and space was important. The bag has kept me warm and comfortable down into the 40 degree temperature range, but you're going to need to put on a base layer when it gets down into the 30's. I'm a big guy and the bag gives me ample space to move around. I'd recommend this bag.
This review was written in the old system and had content requirements that are different than reviews written today.