15 liter Deuter, green for female, 58, 140 lbs, C cup (related to fit with backpack straps)

Pros
-Light and sturdy.
-Easy to pack it inside suitcase (for travel)
-Functionally large enough small top pocket for wallet, keys, energy bar, smal headphones, etc.
-Very comfy even when chock full with water bottles (I have terrible back problems)
-Fit well (female, 58, 140lbs, mid-broad shoulders, C cup)
-15 Liters big enough for light rain jacket, headlamp, light jacket or Down light jacket, small book, large Bose on-ear headphones/case, snacks, with room
-fits 2012 ipad.
-nice green color

Cons
-No front open shovel mesh stash pocket or daisy chain to add stretch cords for make-shift stash placethis is the biggest drawback

-pack gradually tapers on the bottom which is almost indiscernible from inside, but the little plastic clasps that attach the light weight belt on the bottom of the back panel are mildly and periodically annoying.

I would buy this pack again. It is 95% perfect and i can rig up some kind of bungee cord stash area in front.