This is only the second Therm-a-Rest I've owned since 1995. The first one lasted forever..even after it wouldn't hold air I used it because, well it was like an old friend. I held a funeral for an old friend and replaced her with a newer model. NO regrets! Half the weight, additional comfort (this one hold air) and it's not a subdued color. Since I only recently got my hands on this I don't think I can give it any real justice, but I am confident that I will be comfortable on my two week backpacking trip on the AT. If I have something differnt to report, I will. I'm really not expecting anything but bliss.