This bag gets a 5-star rating for the roomyness and the fact it does not have a laptop slot in the main compartment.  I bought this as a flight bag (pilot) for 1-3 day trips.  The material is not quite as robust as I was expecting (I am used to Tumi and Victorinox ballistic nylon), but I also did not pay that price :)

I was also not entirely impressed with the zipper quality, but it is something I can live with.  Already proven to be waterproof in a decent rain storm.

I can tell it will hold up for a while, but not sure I will get many years out of it.  But, at $50, I am happy to buy another one when needed.