they definitely are made with the vents facing wrong, with that being said they make the car look like a tuner's toy, and had they been made right they could have looked Ok at best but these cars aren't Mustangs. It's to each their own though as with the window louvers ... personally I think they're hideous monstrosities but YOU = the next guy may think they make your car look bad ass awesome and increase the value.
The Maverick/Comet is just the wrong kind of car for louvers. They look more appropriate on cars with large rear windows, and look just plain ridiculous on side quarter windows.