Okay, You'll see below I was skeptical about the Rotating Load Transfer Disc but it turns out this the KEY to why this pack is so amazing. Took this pack up Mt. Shasta with about 40+ pounds of gear. Somehow once you get the pack on, the hip belt makes the weight seem to disappear. I felt nimble and energetic where usually with this much weight I feel sore and stiff after one day. Highly recommend this new system.
I wanted all the little gizmos that other bird-named packs have, but my SMG guides on Shasta convinced me to just use the various loops to hold ice ax, poles, crampons, etc. I guess the elastic gizmos break and a simple strap is more versatile.
All in all this pack carried heavy weight with ease, gave me great mobility while climbing, had lots of convenient features like the U-shaped zipper to access everything and the kangaroo pocket to store extra layers, etc. and really seemed to hold more than the 85L.
Guess my only complaint is that the wing pockets on both sides of the hip belt are very tight to hold a 1L Nalgene type bottle. You have to work to get the zipper up or risk having the bottle fall out. Guide services don't like the bladders for high altitude/cold.
This is my new go-to backpack for heavy loads. Really is awesome.