Looks to be a pretty nice bag, HOWEVER, laptop compartment is smaller than advertised.  The large bag is supposed to fit laptops 18.5" wide by 12.4" high.  My Dell M6600 is 16.5" x 11".  Should fit, right?  But in fact, it doesn't.  It will fit in the main compartment, but you lose the (admittedly small) protective layer in the laptop compartment.  More importantly you lose the TSA approved feature where you can just unfold the bag and don't have to pull the laptop out to have it x-rayed.  Not the end of the world, but it wouldn't hurt to get the facts right in the description.