I used one in the marine corps and bought one off of another marine right before I got out (still have it). I like it for what it is but I believe there are a lot better and more comfortable packs out there. It's pretty huge with the ability to put a tremendous amount of gear in it. I do like it a lot more than it's predecessor the ILBE pack. I will say the original FILBE pack was sewn in a way that you could actually rip the shoulder straps out of the bag if you tried to pick it up by one strap when fully loaded. There are some kits out there that fix this issue but I just used some 550 cord which worked great. It's hard to explain what I am talking about but I will try to get the pack out later and take pics for you. Why are you asking about the FILBE anyways? What would you use it for? Hunting, camping?