So far I am very happy with my Ultra. It is very comfortable with both light and heavy loads. I have gone on some long hikes in the 40-80 lb range and some shorter ones in the 100+ lb range. No hot spots. Carries a load well. Amazing how light it is yet how solid it feels with a heavy load. Suspension is comfortable as well. I don't feel that it is too thin and I like the spacer mesh material, very fast drying / breathable.
