I used this bag + the packing cubes as a carry-on for a three week trip to Europe. It holds a lot of stuff, and was never questioned as a carry-on, even on Ryanair. I've used it for several trips in the past 1.5 years and it has held up beautifully.  The backback straps are easy to tuck away or pull out quickly. I only wish it had some hidden wheels for when I really overload it and need to carry it a long way.  When I do check this bag, it holds up well and is very easy to spot on the baggage carousel.