Perfect size for daily use, though I don't need to carry a laptop. Holds so much more that I thought it would without being oversized. Been looking for a backpack with these dimensions for so long. Leave it to Travelon. Plenty of compartments and the open outside compartment actually holds a full size water bottle without it dropping out! And, when empty, the bag is very light. My only objection is that the back straps are rather short which makes putting it on and off the shoulders somewhat awkward. It would be perfect with about 3 or 4 more inches to lengthen the straps. And the security features are definitely a plus. All in all, a great bag.