We bought two for our trip for SE ASIA, it was PERFECT for rambling travelers.
The unit was high enough if we walked down rough roads and the handle was sturdy.
Everything about this unit was of great quality in construction and form factor.
My recommendations or wish:
Main Pack: An expansion option or zipped expansion feature would be nice. Elastic or expanding buckles that attach the Back Pack would be nice too.
Back Pack: An expansion option or zipped expansion feature would be nice. And perhaps 2 more exterior zipped pockets on the unit.
*After taking off the Back Pack, the Main Pack fit nicely in the overhead compartment in international flights.