Buy it on amazon: http://boxvimo.com/affiliate-link/

This bag easily holds a 15.6" laptop, plus some of the extras you may need to carry with it.

Pros:
-Removable inner sleeve (great for moving through airports or for short trips when you don't need a strap or other stuff)
-Pass through zipper on rear outer side (for sliding through luggage carry handles)

Cons:
-Shoulder strap is not removable
-The rivets on the handle look inexpensive; time will tell how they stand up.

Overall, not a bad choice at this price.