Yes if I am in an unfamiliar area or poorly lighted area trying to park.. windows go down while backing into a parking spot.. but at night driving, I have not really had any issues.That must be tough to see at night, especially having the windshield so dark.
20% on the windshield? I had 35% on a windshield when I was younger. Recently drove my brother's truck with 35% on the windshield and I could tell my eyes weren't young anymore. I have 50% on my windshield now and it feels like a sweet spot.I had my front windows done in 20%. Nothing on the factory tinted rear glass. Only other thing is my windshield is tinted 20%. Your factory rear tint should be around 20% like most cars so you should be able to get away with just 20% on the front two windows