I have 15% all around and i have to say its about the best of both worlds. Of course its still illegal but yet in some lightin conditions it doenst look as dark as it is. And you can basically see at night while backing up. Only time i can not see when backing up is if there are no other lights in the area and I just wanna be sure I see everything but i dont have to drop my head out of any window. I just drop the windows and use the mirros. Also when first applied 15% does give u the effect of not being able to see out of the windows but once it adheres all the way its perfectly fine. I'm considering getting my windshield tinted bc it will make the tint appear darker.