Finally, some feedback. And those thoughs were not by me, just fellow soldiers i know. Yes the patrol pack is the primary designated fighting and general use pack in areas of known concentration; but the problem arises when you are in full ruck lumbering through the woods. It actually takes quite a bit to throw off the main ruck, especially if the chest strap is on and the waistbelt, to switch the patrol pack from the ruck to stand alone requires 4 buckle to be snapped out and 2 to be snapped in, quite a long procedure, in normal situation, very fast, but under fire, slow. I've tried it as they described and it is horrible, the pack when fully pack (not properly, just fully) is gargantuant, especially with a sleeping bag. Width alone can get up to 23 inches jutting from the small of the back. and that is just fine in the old Alice, but the patrol pack on top shifts, and if unproperly secured slides over the head in a prone fighting position. Add this qith a kevlar and it is really bad, i tried it with my kevlar and it was horrible. With practice they can be removed fairly quickly, but still not quickly enough to go into immediate prone. Basically that is all that i have been told and all that i have tried, most of us will never be in anything close to that, so once i get a chance to do some real world rucking with no prone position required, i will post full review.