I traveled to 13 countries on trips ranging from 3 to 12 days using this bag and have no complaints. I packed it wayyy too full many times, but the zippers held up and the back support was sufficient for me (130 pound female) to carry it for miles with little discomfort. I was nervous about budget airlines with their strict carry on rules, but was able to carry this pack on (with the day pack zipped off and taken as my second item) on Vueling, RyanAir, EasyJet, and Belgian Air. The zip off daypack (which has a laptop compartment, though unpadded) was a lifesaver. This is the easiest bag to pack and live out of in hostel/hotel situations. Highly recommend for air travel and light to medium hiking days. The only thing I'd change would be to add pockets to the hip belt so you can pull out money/tickets/phone without taking the whole pack off.
Hayley the Student Traveller
Fort Worth, TX