Nice features, well designed
There are a lot of little things that make a difference in a messenger bag:
Size - This comes in several sizes. Medium is perfect for a laptop, couple of books,notepad, and basic supplies. The small (I checked out several sizes) is actually great for most every day stuff if using this for commuting to school. It will fit the stuff mentioned above in the medium but a little more snuggly. The two books would have to be on the small side - not 2 dictionaries!
Pockets and dividers. There are three main pockets in the interior. Then there are a number of smaller slots, zippered pockets, etc. for supplies, pens, keys, comb, etc. It also has a set of pockets outside the main compartments for easy access to things like keys, pen, ...
Shoulder Strap and Buckle - This is a big deal to me. Some bags have no buckle, you just pull over your head. But sometimes a buckle is nice. This bag has the buckle on the side of the bag which is NICE. It doesn't get in the way like some where the buckle will fall across your chest. It also has a nice system for keeping the extra strap material organized (see picture).
Closure - It closes with two buckles. But it also has two strips of velcro. So you can quickly flip the cover over without buckling up and you will be fine.
Construction - Very well made with a tough nylon exterior. The inside is coated so you don't have to worry about your stuff getting wet if stuck in the rain or splashed by a reckless driver!
Overall this has a lot of nice features