Only used it once so far, but my initial impression is very good. The campout I took it on was just a weekend out with temperatures in the low 40's to upper 30's at night. The bag was very comfortable. I specifically like the design and construction of the drawstring and closure around your face. It is easy, efficient, doesn't get Velcro up against you, and is easy to find at night in the dark. The dual full-length zipper is great to help regulate temperatures at both ends - I wouldn't buy a warmer weather bag without one. I also like the storage bag it comes with so you don't have to store it in the stuff sack, that way the down maintains its loft better. Overall, excellent.