I have never gone backpacking before (only car camping), but I bought this bag with the guidance of a much more experienced friend. I've spent one night in it so far and was very happy with it. The night was quite warm, so I fell asleep on top of the bag but crawled in it sometime during the night. I'm a pretty cold sleeper so I was comfortable that night. It didn't feel like it got too hot for me, but for someone who sleeps warmer it may not work as a summer bag.
I do wish the seams were a bit more durable - I tore a little hole in it where the tag had been before I even packed it up for the first time, but it was nothing a little home-repair couldn't fix.
Overall, I'm very happy with my purchase so far and I think it will continue to serve me well.
This review was written in the old system and had content requirements that are different than reviews written today.