80 ceramic xpel on my windshield, legal where i live. no waivers or warnings from my local tint shop. no issues with anything, electronics or driving. cant really tell its there tbh, but it does cut heat, ive done this on all my vehicles. ive had 35 on the front in the past, that was perfect to me, but not legal here so i opted not to this time around just to avoid hassles with law enforcement and inspections. hope that info helps good luck