The 50% on the front is some but the 15% in back does a great job of privacy. 5% is limo tint so that’s not too far away. The 80% is purely for heat rejection .
I think you need to have the tints at 20% or darker to really darken drivers and passenger side windows for privacy. I left mine at 35% because it makes it less likely that I would be stopped by police because they can still see inside the car during the day. My rear doors and windows are 20% because Cali has no limit on how dark those windows can be. I didn't want to totally black them out, though.
I had a member on my staff that went 20% on his fronts as well as windshield and he had to roll his windows down at night when he went to turn . This was a tricked out Silverado that was lifted, so he could be seen and others could react. I’d stay a bit in the lighter side up front for multiple reasons .