This has to be the nicest backpack I have ever seen.  It's lightweight and well-balanced (I am 5'6" and it feels very comfortable on my back).  There are nicely padded slots inside for storing things like iPads and laptops.  It's a good size for traveling for long walks, or for carrying into an airport.  I like the clip in the middle of the main straps that lets you attach it across your chest.  This baby is not going to fall off while you walk or run.

The zippers are unusual (that's because of the waterproofing) and that makes them a tiny bit hard to operate but it's not a show stopper.  I like it.

The only real caveat I'd give is that the part that's directly in contact with your back is soft but not terribly pliable.  It's not uncomfortable but it might make it a little tough to cram the backpack under the seat in front of you, especially on a puddle-jumper.  That is not a criticism by any means.  You buy a Pelican because it's the best way to protect your 'stuff' and this one keeps that promise.  It's just something to be aware of.

This is my new go-to backpack for traveling.