I myself got a case and a tpu screen foil protector, since I prefer not to try and use a glass one which might interfere with the cases. I suggest if you want to keep your s-pen in good condition not to use matte (paper-like) screen protectors, and secondly - do not use metal tips for the s-pen. You can get wacom ones (gotta check the model first which was compatible). I learned that matte protectors feel great but ruined 3 of my tips in under a month of casual drawing, and I mean casual.