Patagonia Lightweight Travel Pack 

"Packs up really small, and looks much better in person. Two water bottle pockets are perfect and not available on most of these packable bags from what I saw. There's nice padding on the back panel and the straps are really comfortable. Definitely would recommend to others. Really going to come in handy on our cruise! Thanks eBags! Your description and pictures are always the best around. Makes shopping easy."

"This is a good bag for dayhikes/overnights with an extra pack, but not so great for in-town stuff. It haz zero structure to it, so it's a glorified ripstop sack. If you bring a computer or a camera or anything else, you have to make sure you have some other clothing or padding to serve as a cushion. I definitely think it's a great dayhike bag, but there is no padding on the shoulder straps, so lugging anything more than a lunch and a first aid kit and a pullover and you'll feel it by the end of the day."