The Asics Lightweight is good for its value and ideal for commuting. It features a hydration-compatible main compartment; there are also pockets on the back, hip, sides and one on the front strap. A conventional waist belt and chest strap stop the bag bouncing too much, but the chest strap-adjustment rails feel quite sharp. The padded back protects you from hard loads such as books.
Good as a commuting bag, but not for a long run.