I use this bag for everything. I mostly use it for hauling camping and rock climbing gear. I have only taken it on day hikes so far, but also load it with 40lbs of gear, which is on the heavy side for this pack. I also used it as luggage for a week trip to Europe. Its big enough to pack for a week of travel and small enough to carry-on flights. MHM seems like a very innovative company. The pack is very comfortable and the back ventilation is good but not the best I've ever seen.
I looked for a few months for a quality, adjustable backpack and was thankfully, referred to MHM products. What a pack....the quality is just fantastic and the fit is even better. These guys are outdoorsman first, so everything is well thought out. Yes, they are not inexpensive, but I plan to own/use this pack for a very long time. Bravo!