Just made the switch. X-ray to Shape Charge, it works for me. The one thing I can say about Kifaru packs is that they are built on a progression of use. What I mean by that is like the previous poster stated I found to be true, but I like the longer narrower design better, plus I usually put my gear in my bags in individual pouches and put them in the pack according to weight. I also like the way the Shape Charge fully opens. It is really about philosophy of use and what you are comfortable with. I was scared selling my X-Ray, but the Shape Charge is quickly growing on me. What I definitely know is Kifaru Packs are built by fellow Americans to be next to "Bomb Proof".