Agree 90%. I say only 90% because even at 30 the Atmos is a bit overloaded. I'd say more like 25-27 is tops for this pack to be comfortable on me, at least. I have no hips though, meaning I need a much more substantial hip belt on a pack for it to take weight off of my shoulders during a hike.
I've owned many Osprey packs, the Atmos, Exos, Aether. The first two are great lightweight packs, but again, only up to 25# or so. The Aether can carry significantly more (40-50), but weighs 5 pounds, more like an expedition pack. If you want a lightweight pack that CAN carry loads comfortably, check out some different packs, like the ULA packs. The OHM/Circuit packs have much better hip belts than the lightweight Ospreys and carry 25-30 pound loads much more comfortable for my body type (no hips).