The pro's are that this bag has a large accessible capacity and is not made from cheap vinyl that will crack within days.
The con's are the useless Velcro strips that leave you holding the flap (with the contents of the large accessible capacity on the floor) if you don't remember to pick it up by the strap (which also doesn't hold in place and extends to infinity...)
Got so fed up with this, and the annoying rectangular metal strap loops that continually twist around that I sewed them all in place, and added some hammer through press-studs so secure the flap.
O.k. if your prepared to customise...