I like my Vapor Trail because it fits well. I tried the Ozone line and couldn't get them to fit right even with the adjustable suspension. With a compact down bag I can get my pad, hammock, alcohol stove and everything else for about 5 days inside. If I switch to my synthetic quilt or go longer then the pad has to go outside. Since the Vapor Trail holds the pad vertically along the back of the pack, that isn't a problem for me.