This bag is absolutely great. The price is half than others with same features on the market!
One tiny flaw to consider: does not stay in upright position when you are in line for security, passport check, etc.; and if there is a chance to hit someone behind you, or annoy you for no reason, it will  fall flat on the face, 110% guaranteed. It is amusing in a way :)
Easy to prevent it by turning it, so the front would face you, or an other bag.
Otherwise, it stays in the baggage compartment, or in the car, so you are fine.

Knowing this, I would still buy this one without hesitating, instead of the others: after all the design is great, and I was feeling lucky that I got a great bag so cheap!
Color is perfect too (I have a black one and this); better than black because does not show wear or stains like the black does.