I would definitely get it. It is one my favorite feature if the car + if your getting the back up camera it is much easier to see the image on a big screen compared to the tiny rear mirror.
13' Mustang GT 5.0L Grabber Blue 401a, 6spd manual, Brembo brake pkg with Boss radiator, engine oil cooler, Torsen differential & 3.73 gears. Back up camera with Navigation.
Mods - Flowmaster Outlaw, Roush front, side, rear splitter. Roush hood scoop + quarter window louvers, Barton 2 piece shifter bracket