My girl Lauren got this pack a few weeks ago and gave it a spin in Shenandoah National Park and had some feedback to share:
We hit some of the AT and falls. Pack worked great for day hike! Enough room for the essentials and extra layer for cold and rain, food, and snacks. The suspension system in the Mira is great and cuts down on the feel of the weight you are actually carrying. Very comfortable and I have been recommending the Manta and Mira.*
The Manta is the Men's version of this pack. The sizing for back length is the same from M to F versions but the women's packs have straps that cut back to the pack sooner -- to get out of the way the chest and giving ladies a better range of motion.