I’ve been using this wax for the last 7 or 8 years. On hundreds of playfields. Absolutely no ill effects to speak of. I’m very happy with the results.
People mention it has too much silicone. The only concern I have with silicone is how hard it is to remove if I wanted to clear coat a playfield. You have to be thorough with the naphtha or wax and grease remover. No big deal, I do the same thing when I paint a car or motorcycle.