The first time I loaded this pack up and put it on I fell in love! It fit me so securely, I felt like I could do cartwheels. There is just enough room for rain gear, down jacket, shovel/probe, extra gloves/hat, the essentials (sunglasses, sunscreen, headlamp, compass/map, emergency extras, etc.), food, and water. I can strap on a pair of snowshoes, ice ax, and crampons to the outside and I'm ready to rock for an entire day in the backcountry.
I do wish the hip pocket was a tad larger. Deuter could fix this on all their packs, I think. The lid is also firmly attached to the pack in the back (i.e. it doesn't float), which makes adding that last piece of gear challenging.
If you're looking for a smallish day pack, you can't go wrong with this one.