Skque Clear Crystal Screen Protector for Garmin n¡§?vi 1450/1450LMT 5-Inch Portable GPS Navigator, 2 Packs
Clear, fairly easy to install.  However, makes the Garmin touch surface considerably less responsive to pressure--it takes longer to input commands and data.  You may have to press harder, or press a couple of times for certain letters.<br /><br />On the other hand, it will protect against scratches.  You can't have everything.  At least the film is pretty cheap.