The Timbuk2 Classic Messenger Bag is a heavy duty over the shoulder style bag that holds all your stuff and looks stylish while doing it. Their distinctive 3 panel design can be purchased in a variety of stock color combinations or can be custom ordered on the Timbuk2 site. It is available in several sizes but this review is for the Medium sized bag. I'm sure most of the statements will apply to all of the sizes.
The large flap on the front is secured with 4 large sturdy pieces of velcro and two adjustable buckle snaps so it won't be coming open by accident. The front has a zippered pocket and inside is a internal pocket system with two zippered pockets, pen holders and even a fleece lined cellphone pocket. The majority of the inside of the bag is wide open though and it can hold a surprising amount of stuff.
One of my favorite features is the waterproof lining that keeps your items dry and also it is a light color so it is easy to find items inside. A lot of times the bottoms of bags get so dark it is easy to lose things.
The shoulder strap is nice and wide and doesn't pinch. It is also quickly adjustable.
While these bags are expensive I feel they are worth the money because of their quality and style.