I was looking for a travel bag for years until I finally found the Patagonia sling bag. It stuffs into it's own pocket, so you stow it away. I use it primarily when I'm traveling and wandering around a city knowing that I'll be out the whole day. This way I can keep with me everything I'll need and not have to return to the hotel: light jacket (or patagonia nanopuff), sunglasses, maps, camera, gorillapod, extra batteries, and water. It's small, so you don't feel like a backpacker or like you're taking up too much space when you pop into a restaurant.
"High quality bag, but much smaller that it looks online."
This bag is super good quality, but it is tiny! I expected it to be a decent sized bag, but I realized after I received it, that is must just be meant to hold a few snack or something because it was too small to even fit a decent jacket in.
Just got mine yesterday! I have a scooter and needed something quick but lightweight to pack around. This is just right! I holds just what I need it to and looks great doing it. I've named it Patty. I think Patty and I are going to get along just fine :)