I've got several of these. Fully loaded, they tend not to hang from the strap properly. They're OK, but I think a decent fanny pack setup would be more comfortable to lug around.
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein