Rating: 5 / 5
Used this pack for two 3-day/2-night on-trail backpacking trips in the Olympics and Cascades in summer. Also used it as my only luggage for a four week hostel trip in Europe, where I carried it on planes. Has held up with no puncture or seam failure. I can see a very slight loosening of a few turns of stitching attaching straps to pack near the neck. As others point out, the pack is relatively fragile and won't last more than a few seasons of on-trail use.
On-trail, I insert a rolled 3/4 non-deluxe Ridgerest into the pack, letting the roll expand fully with the ridges locking into one another to keep the volume. The resulting cylinder of several layers of foam pressing firmly on the entire wall area adds a remarkable amount of rigidity to the pack. It also prevents objects inside from poking through, stretching the fabric, or point-loading a seam. This arrangement keeps its form even when empty. The 20" high roll is the perfect height for this pack. The pack is narrow enough for uninhibited arm swing, and its efficient boxy shape keeps weight close to the back. With ultralight loads, the shoulder pads are entirely comfortable with the provided foam inserts, which I keep in all the time for a pack weight of 4.1 oz.
With the collar fully extended, the pack holds about 2500 cubes. Unlike some reviewers, I find the velcro cinch system quite effective on the roll top. I routinely carry 7 lbs baseweight for summer overnights as a 6'3" 200lbs-er with all XL personal gear. In addition to the skimpiest of sleeping bags, this weight includes Gossamer Gear's generously-sized two-person tarp, as well as stove and shared accessories for my significant other and myself. My pack takes most of the food for the two of us for three days. I have to dismount the pack to get my water bottle, which I like to keep in the main compartment to keep its weight high and close to me. The enforced break is usually welcome. A little less convenient is stuffing the map in the one external pocket on the back, out of reach except by a partner. Nonetheless, I would keep the pack just as streamlined as it is.
The only improvement would be a yet-to-be invented fabric of the same weight that lasts longer. Gossamer Gear's Whisper Uberlight is a very nice product for the ultralighter willing to replace inexpensive gear every few seasons.