I just added the Paperlike 2 protector to my iPad Pro a few month ago. It's amazing to write on now. You can notice a bit of distortion in the display, but it's really nothing that bothers me at all. I've been very happy with this combination. Because of this setup, I've switched almost all of my note taking over to my iPad. Before, I only took notes in a paper notebook (large Moleskine soft cover). And so far, I haven't had any excess wear and tear on the Pencil nib...
The only issue I had was waiting on shipping from Germany.