Works great as a part of my sleep system, can use it by itself in the warmer months and can use it in conjunction with my sleeping bag in the colder months.
One thing I think could be improved with this product would be to have a full length zipper as it would make it easier to get in and out of, and you could then open it up and use it as a blanket.
I guess the zip is small to keep the over weight to a minimum.
Extremely lightweight and great for Australian conditions. Team it up with a sea to Summit reactor bag liner and you have a perfect sleep system for Australian conditions for most of the year.