Bought this after studying reviews for much more expensive sleeping bags, and wasn't disappointed.
Delivery was much quicker than originally suggested, and being able to track it online meant I could be in when it arrived. The sleeping bag is very warm and comfortable. Although I used it during July, the weather wasn't that warm and I spent one evening shivering - until I got into my sleeping bag and was warm as toast immediately. Surprisingly, with a little bit of care I can even get it back into the sack.
The only problem I've noticed is that it is very easy to snag the zip.