SD really did their research before they released this pack. I've always been a huge fan of Osprey, but the suspension on this really caught my eye. It's got the best balance of load stability and back panel ventilation I've ever tried. The individual pads feel a little odd at first, but quickly disappear, and the air channels are completely unobstructed. Without a jacket on, you can feel noticeable air movement. I've taken this on 2 overnight ski trips and it has just enough room for a long weekend with winter gear. I think this will translate to a comfortable 3-4 day backpack in the warmer months. It's low profile enough that it didn't readily snag errant branches, even when skiing through tight trees. As well, there was no noticeable load flop back and forth, even when lightly loaded.
Build quality seems on par with any of the Osprey's I've owned and seems as though it will take some decent abuse while still having a good lifespan. As I've only had mine for a few months, we'll see what extended use does to it. I personally, foresee a long and happy relationship.