I found the video on the Lowe Salient quite fascinating. I have a somewhat smaller Lowe pack dating from the early 1980s that was my SAR bag then. It has many features in common with the Salient, although it lacks the adjustability and hydration system of the more recent model. I assume the top lid of the Salient can be detached for use as a separate waist pack; the video didn't seem to cover that point.

My pack saw a fair amount of hard use - tossed in and out of helicopters and pickups, slept on and stepped on - it has stood up quite well and I still use it now and then.