We ordered this for my wife as a replacement for a beloved backpack she has been using for years and which finally bit the dust when the zipper broke. At first we tried to find an exact replacement, but that proved impossible as that model hasn't been manufactured for years now. Based on the description, pictures, and reviews here, we ordered this Fat-Boy as well as the Teton Bookbag Backpack.
Be aware that apart from a few minor design differences (colors, zippers, stitching, etc.), these two bags are virtually identical, obviously made in the same factory in China. After examining both, we went with the Fat-Boy, chiefly because of color and what we interpreted as slightly heavier duty hardware. Honestly, I think that we would also have been quite happy with the Teton.
I am pleased to report that my wife is extremely satisfied with the Fat-Boy. She is a grad student and uses it to haul around books, notebooks, lunches, and the miscellaneous small stuff routinely going back and forth from home to school. (The laptop has a dedicated carrying bag.) The Fat-Boy is heavy-duty and well designed with lots of functional compartments and features, including the dedicated cell phone pouch on the front of a shoulder strap, which she loves. In short, this backpack is so good that it is easily eclipsing the memory of her old one. Highly recommended.