Very Impressive Pack!
I just took this pack down to Coal Pit's Wash outside of Zion NP and was impressed with how tight the pack holds everything in a minimalist design that is very durable and light. The 420D fabric is super bombproof and didn't rip at all on the rocks, cacti, and trees it brushed up against on the trek. I found the bladder adapter to be quite simple and effective as well for easy access to a drink of water. Overall, a great design for those quick alpine ascents and two night desert trips. I would not recommend the Naos 55 for any trips over 2 nights if you are taking a sleeping pad, tent, sleeping bag and cooking gear as it is a bit small for anything over a short jaunt. I would recommend the Naos 70 for anything else over 2 nights if you have a ton of gear. My only problems with the pack was the waist belt rubbing on my hip a bit, which was annoying but could be something to do wtih adjustments to the pack perhaps. Also, the side gear straps could be made a bit larger for adjusting to larger diameter tents (when packed), but I managed to squeeze it in there. Overall, this would be a great pack in coastal rainy climates or a super durable pack or mountainous/desert climates as well.