I've used this bag both as a carry-on and as checked luggage, and it's performed admirably in both regards.  It's well constructed and well designed, with a good arrangement of sub-compartments, tie-downs and pockets.  The handle telescopes to a good length for my height (>6'), plus I found that it holds well at half-height, allowing me to carry the bag down airplane aisles without bashing seated people in the arm.

Only minor quibble is that the tiedown web in the main compartment (two straps plus material) started to fray.  But, to be honest, I haven't been gentle.