I ordered this bag for a 13.1 inch Sony laptop after reading many reviews on other bags. For my needs this is a perfect size bag with the right amount of pockets and space. The only suggestion I have would be to design it with a carry handle. The shoulder strap is adjustable, but not enough to carry it by hand instead of on your shoulder. I like the metal clasps on the strap and the metal rings you connect the straps to on the bag. The shoulder strap has a pad too. There are two inside pockets, one for the computer with a velcro strap to secure the computer and the second can be used to store a book or your power cord. Under the top flap there are several individual pockets designed to carry cellphone, iPod, pens, small cords, etc. This flap is secured by a sturdy clasp. There are two outside zipped pockets you can store thin folders or other paperwork.
This messenger bag is designed to carry a laptop, power cords and some work materials. It is sturdy and appears it will last. I highly recommend this bag.