I have 35% all around on a jet black car with black interior. I commute about 40 miles per day in Suffolk, occasionally into Manhattan. I have had no issues whatsoever. If a cop is near me, sometimes I get paranoid and pull back the sunroof shade. But they generally pay no attention. Unless youre driving like an ass, I dont think you will be hassled for the tint.
2012 BMW 328i Sport Line, Jet Black (Sept '12)
2008 Mitsubishi Evo X, GSR Graphite Gray (traded-in)