I was very impresses with this bag. I've used it as a liner to boost my 3 season bag and on its own, when using it on its own it was still comfortable down to 14-15°C and was tolerable up to about 22°C with high humidity, but in those conditions no bag is needed. The bag is very compressible and light for it's warmth, the ratings are accurate for me and I think the material is of decent quality, nothing to complain about, especially for the price!