If you get it from the dealer stating it is legal on some type of form to document you of any trouble than go for it. You'll run into cops if they just have that "special day" to mess around with you telling you to remove it. Then you can take them to court and fight it with your proof of purchase that the dealer stated it's legal
Anyway just don't go over board tinting your windows in Cali and if you do the front just cruise around with the down if you have a bad feeling or see a cop.
Cops just get nervous with dark tinted windows up front because they can't proceed your window with caution since they can't see the driver