Ok so I got this pack a few weeks ago, and so far I've only used it once. I had over 60 pounds (the limit) in it because it was only a two nighter so I was like well let's pack some extra goodies. It felt real light on my back. The material is definitely durable and there is plenty of room inside and outside. I do like that the water reservoir holder is on the outside of the pack. Allows more room on the inside. The detachable daypack is basically just a fanny pack, unless I used it wrong. The daypack isn't very comfortable, and I would recommend a different on than the detachable portion of this pack. Definitely was just going to be an extra bonus if it worked out to be a good daypack. I love that you can access the pack from the bottom, front, and top too. Excellent and useful feature. I'm extremely happy to have this as the first pack that I've personally owned (Borrowed my friend's pack for a while). I will probably update my review once I take it on some longer more intense trips. So far so good though! Oh yea I am a male, 5'11, muscular 200lbs, and the large seems to fit me very well.