I used to have 30% on my old car. My sister had 20% on her car and i thought it was too dark, so i went with the next stage, and i didn't like it. I love my tints now. They are dark on the outside, but barely affect my view from the inside. Except sometimes if i'm turning left or right ontop a dark road since i don't have my headlights to shine over there yet it can be really dark. But that's the only con i can think other than police.
20%
30%
50%