It is robust, comfortable, and offers lots of storage space; there is very little to complain about. I traveled with several days, there is room for all if we optimize a minimum.
However, be careful: my computer 15.6 "(Notebook Asus N53SV) does not fit in the section provided for this purpose last, by spending a few minutes it fits there, but it's really limited and extremely tight (you force the zipper , to avoid), and I do not want to spend time to pack my computer every time. The "documents" section can accommodate against by my computer without problems, its bottom being slightly protected by the umbrella canvas below the bag. A problem that can circumvent so. A slightly smaller computer will return without worry. Be careful therefore for 15.6 "a little thicker than normal.
Otherwise, I am very satisfied and I recommend. If my computer came in, it would be 5 stars but the lack of any margin makes me lower the rating to 4 stars.