There should be a slot on the side for you to add the name of the airline you're flying, maybe slide in a baggage claim ticket with the airline's logo. You know, so you can advertise to other travellers "I'm flying on [Delta Airlines] and they were too cheap to comp me a hotel room for the night." That kind of negative advertising will either get you a hotel room, or maybe thrown out of the airport.

Seriously, I don't like that it separates the traveller from his baggage, if you zip up the bivy door you either need to keep them in with you or leave them outside while you sleep. Some attached webbing that locks around the handle of a carryon wouldn't add alot of cost.