I love the flexibility and comfort of this pack. It's so light and small enough to use as a day pack, but expands for multi-day hikes. No problems getting this through as carry-on. Take the belt off and put it inside the pack, and you can also take the frame out and put inside to make it even smaller. Best point: very comfortable on long hikes, and the hip belt does a great job of taking the load.
This review was written in the old system and had content requirements that are different than reviews written today.