I own multiple Maxpedition bags and am VERY happy with them all. As someone else mentioned, the single sling or "gearslinger" bags can take some getting used to, however they are great for anyone who commutes on public transit. The idea is that it can sling forward and sit on your chest without taking it off, and have the contents accessible.
I do not have any experience with 5.11 bags, but I do own some of their clothing and it is fantastic.
I do not have any experience with 5.11 bags, but I do own some of their clothing and it is fantastic.