I had no problems with the interior after the replacement. Headliner looked the same as when I brought it in, and no noticeable change to any panel. I did not notice any new noises afterwards, and I was hyper focused on it for several weeks to make sure. There was a bit of a lubricant smell for a few days, but that did not surprise me and faded quickly.
I think the scratches were there when I bought the car, to be honest. There were multiple parallel scratches across the glass on each side, with clear companions on the other side of the car. They did not span the whole width. It almost looked like a buckle from a strap was dragged across the glass. Dealership swears they weren’t there, and that my ppf and ceramic guy must have done it. Never got to the bottom of it, unfortunately.