I get cold very easily so it was important that I get a comforter that keeps me warm especially since the year-round nighttime temp is between 40-50 degrees. I mistakenly left my window open last night and it was approximately 45 degrees out. This comforter kept me warm, I hadn't notice the window was open until I got out of bed. Downside was after getting back in it took a few minutes for my body to warm up again. This is a light comforter for it's size so it's easier to maneuver around than other king comforters I've slept under. Out of the box, it was so flat that I was worried I would be cold. It took about three days to fully fluff, even then it is not bulky. My only real problem with this comforter is that it makes a fair amount of noise.