The bag seems to be of very good quality, but if you order the green tea color be warned that it is darker than it looks on the computer - think Kermit the Frog with a slightly olive tinge.
What a terrific find-soft, durable fabric that is warm and toasty from the start! The flannel is smooth, and outside covering is rugged. The zipper works smoothly (would like one that is just a little heavier gauge but this will work!), and the straps sewn into the bag for keeping it rolled up are ingeneous. And, the price is sweet. I have been sleeping in my bag for convenience sake, recently, and it's hard to crawl out in the morning. Thank you!
I bought this for my 8 year old daughter and she has already used it twice. She used it for a slumber party and it was perfect - warm and snuggly and the style was age appropriate. The following week she used it for a Girl Scout campout and the temperature dropped down to about 42 degrees. She said she did get cold, so my guess is that it's probably fine to about 45 degrees, but much lower than that and you may want to consider one of the other styles. Also, the storage bag was very easy for her to use and pack her sleeping bag by herself.