I use a screen protector on my MacBook pro. I have classmates and study groups buddies that keep pointing their fingers, pencils, and pens at my screen when we discuss class work materials, even my math teacher point her pencils to my screen. I don't know what's the matter with them. I decided to put a screen protector on for the sake of a piece of mind. I use the cheap one from eBay for like 4 dollars with shipping and it apply on great without any bubbles and almost flush to the rubber seals around the perimeter of the screen.