The employees are honestly the worst I've seen at any fast food restaurant. You're in an airport, so you would expect fast service. They're lazy and not at all polite. Also the soda machine was totally out of order, yet they were still charging people for combo meals.
I'm not one to pick on fast food restaurants, but this one is as bad as it gets. There aren't a lot of options at McCaren, but you might want to try anything else.
Also your standard combo meal is over $10. Rarely will you see that at one of the big burger chains, even at an airport.