Rating: 4 / 5
Excellent day pack. I use mine every day around town and occasionally for day hikes, scrambles, and climbing. Mine has taken a beating on nasty bushwacks in the rain and kept my gear relatively dry (not seam-sealed and made of silnylon, so you can't expect the world). I've been really impressed with it's durability.
You can remove the foam backpad and then stuff it into the under-lid pocket, which compacts it down to about the size of an apple.
The shoulder straps are just mesh fabric, but fairly wide. If you keep the weight down (<12lbs?) you probably won't notice.