I just came back from alaska and while training my buddy had a kuiu and I have the exo. everything was great with both till we started using moose weight to train with. once we got over 80 pounds his pack did not do well and now he owns an exo. Like everyone says though packs are like boots and you need to go with the one that fits you best. I tried SG and kifaru before exo and I can't imagine finding a better pack for me.