Crumpler Pretty Boy Backpack XL camera bag

Hi All, Has anybody used one of these bags. I am looking for a suitable bag for trips abroad but must be able to have as cabin luggage and take a laptop as well.

I've used a Lowepro Computrek AW. That's pretty much the exact size of hand luggage. It easily fits a 15" laptop, 1 or 2 SLR bodies, and 5 or 6 lenses. Bear in mind anything with all that stuff in it is going to be heavy.
As a tip - most airlines seem to regard laptops as a piece of personal "equipment", like a camera or watch. It can be taken out of your hand luggage and carried, if you're hand luggage is too heavy.