The Barley is my bag for day long rides. The side pockets are good for tools and tubes and the main compartment will take a jacket, lock, food and a couple of books. It's too small for shopping trips or to carry ring binders though. For that stuff and for touring I use a Nelson Longflap with a Bagman. It's excellent combined with an Ortlieb handlebar bag. Here's my setup minus my tent that I usually strap under the saddle.