Let’s start at the beginning - price. Yes it’s expensive. However, you do get what you pay for in most things, and this pack is no exception. It’s made like no other with high end/performance materials and manufactured accordingly. The whole thing is top notch, robust, and built for anything you or Mother Nature can throw at it.Comfort: its harness is infinitely adjustable. I won’t go into details - go to Peak’s website and there are very detailed walkthroughs on how to fit it. If you can’t get this pack to fit you better than your favorite pair of broken in boots you’re doing something wrong.Function: Again, visit Peak’s website for a thorough walkthrough. IMHO, this is one of the most well thought out and versatile backpacks I’ve ever owned. And I have a lot of them. From specially designed camera bags to mountaineering to hiking to day packs, all from major brands with tried and trusted names. As it comes without any add-ons it’s a great travel bag that can go from the office to an international trip with ease. The main compartment is incredibly spacious and has just the right number of internal pockets to keep things organized but not so many you can’t find things once you’ve packed it. Access through the magnetic roll top is good, but it really shines in that the whole compartment is accessible without digging through the back panel, which fully unzips (double zipper pulls!) and opens like a suitcase, exposing everything except for one zipped pocket at the top. The secondary large compartment runs down the middle of the back of the pack and is accessed by pulling the loop at the top to release the integrated cinch cord. There are two narrow flex pockets that run down the side of this otherwise single large outer pocket. Because it closes via cinch cords it’s basically open at the top (that doesn’t mean it’s contents are not secured) it allows items to be strapped across the top or have excess material flow out while keeping the bulk secured in the pack. See the listing or the website images with bedrolls or rope hanging out. The two very deep side flex pockets are easily accessed with the cinch cord open or closed and both have secondary smaller less deep flex pockets ½ way down on the outside that are secured by their own removable and reconfigurable cinch cords. There are two more zippered pockets running the length of the back on both sides of the same back panel that utilizes the internal cinch cord. The zippers for these are almost hidden. There are repositionable cinch cords and lashing points all over the pack, and it also comes with two extra cinches to use however you see fit. More pockets, lashing points, and stuff through options on the shoulder straps and waist straps. The waist traps also easily store away behind the back panel for when they aren’t needed or throwing the pack into that airplane overhead. It also comes with not one but two repositionable / removable chest straps that could also be used elsewhere on the pack if you wanted.The only thing missing for standard use out of the box is a rainfly. I happen to have several from other bags that fit it just fine.Do yourself a favor and visit Peak’s website for details on this pack. There’s also a number of great video reviews out there if you look.I’ll be taking mine to Scotland this summer.