The comfort temperature of 24.8F is about 5F lower than reality. I used it for the first time during a winter backpacking trip and the nighttime low was 26F. I wore a base layer of underwear, thick wool socks, and a knit hat. With that, I was able to be warm enough without shivering. I think the fill volume would need to beincreased for that rating, the true reading is more like 30F. The construction is good and the bag is lightweight. So, as for the overall rating I gave it 3 stars but the price was reasonable considering the other features.