I am normally a LLBean gal when it comes to tote and duffel bags, but I think the Land's End backpacks are better!
When DD started preschool, I ordered her a Bean jr backpack that matches her pink duffel bags. We tried several bags, every one the zipper got caught in the trim! I gave up and got the Land's End one. The LE is not only durable, it is also has more pockets and the side pouches for a water bottle, etc. She has now had it 2 years and still looks perfect.
When I was pregnant my DH got the L.E. diaper bag backpack as a gift. Hands down the best travel backpack! DD is long out of diapers and we still use it as our Disney bag. Inside is a light color so easy to find stuff, storage and pockets galore and where the changing pad is stored we now put in Disney maps, etc...