I just recently got to use this bag for the first time. It was a car trip, rather than air, so I can't yet report whether it fits nicely under airplane seats (I'm super hoping it does, because that was one main reason for my purchasing this bag, although I think partially it might depend on how full one stuffs it, since it seems to have good expansion capabilities). In any case, I loved it and am planning to continue using it as regular car trip luggage, too. I was able to fit a lot in, and I liked the various pockets--some, but not too many; seemed like just the right number--and liked the option to have the one large compartment divided with the zippered divider flap or not, just by zipping/unzipping the little flap. The only reason to give this bag 4 stars instead of 5 is that it would be super nice if the backpack straps were removable instead of integrated (not that I thought they were removable or anything, I totally understood that they were permanently attached; just that it would be a great feature if one did have the option to remove them rather than having them take up space/thickness when they're stuffed into the back storage compartment).
