when i say black, i mean its shade is black, and not necessarily blacked out (super dark). if you put on the lightest shade of black, which is medium black, on an untinted glass, it will just be as dark as magic neutral. nga lang, since di siya reflective, mas kita ka sa loob. in my experience, less glare ang black kesa sa magic sa loob. i tried putting magic neutral on dark magic, and boy was there a glare inside.

now, as recommended by alwayz_yummy, don't add another layer of tint on the front and rear windshields para di ka mahirapan sa gabi. kung sa side, it won't be much of a problem. it'll just be as dark as magic neutral, except in a slightly different shade.