I’ve had a 2018 Pro 12.9” for a little more than a year, but only recently got the Pencil. I used it without a screen protector for a few weeks, but didn’t like the feel or sound when I was note taking, so I ordered a matte finish protector from iCarez. I have to say that I should have gotten the screen protector much sooner, even without the Pencil, as the matte finish does a good job of hiding fingerprints and blocking reflections. And with the Pencil, it has a very natural paper-like feel. It’s also an inexpensive way of adding scratch protection to the screen. Highly recommend getting one.