I bought this for myself Christmas of 2013 intending to get my first sturdy day pack for day hikes and weekend traveling. Since, I've used it for day hikes, 2-4 day backpacking trips, other weekend trips, as a flight carry-on, and (in a pinch) as an academic bag. 5'6" female. I have an older model but I can speak to how it has held up over the years and hopefully the new models are at least as good. Overall feels: I find the bag to be quite comfortable, even when loaded with 20-30lbs of stuff. The water bottle pockets are a little difficult to get to, but I got used to it over time. I also enjoy having the brain, because I can grab a pencil/notebook/wallet/snack out of it pretty easily when I'm on the go without too much fuss. The hip pockets are also always a nice feature - I often get comments from friends about them. Overall functionality: This pack really shines as a day pack. I have never fully filled it during any day trip, so it looks kind of saggy while wearing. The brain/drawstring combo also can be a pain to get into mid-trip, but if you plan where to put snacks/water/rain jacket when you pack the bag it's less of an issue. As a multi-day pack, it can hold the basics - sleeping bag, hammock, tarp, water, first aid, a few layers, and some dense food - but I wouldn't count on bringing a stove. The brain is useful for attaching tarps and sleeping mats externally by just clipping the straps down. As an academic pack this is not so great. It's a pain to get into during classes and it's just not made to hold textbooks and notebooks. As a weekend travel pack, it can hold everything without being too bulky on trains/buses, and it's comfortable to wear even in a crowded urban area. Overall durability: The back has sagged weirdly and is now less comfortable, especially when it isn't holding many items. There are no major rips, buckle breaks, or seam failures though and that says something about the quality.