I don't have an iPad anymore but I do use tempered glass screen protectors on my 8 and 9.7 Samsung Tab S2s and I'm glad I do because 2 weeks ago in a single week I first dropped the 8 flat on concrete from about 4 1/2 feet. The screen protector cracked a little but that doesn't effect the performance at all, but if the screen had cracked (as I did on my old Google Nexus) it's kaput. And then a day or two later a heavy metal object fell right on the screen but luckily nothing happened. When I did have the iPad 2017 12.9 I had the flexible glass (how can glass be flexible anyway?) on it, and true enough I preferred it naked, but Apple wants $650 or so to fix those big screens!