I'm okay naman with 3M, after 5 years hindi pa kulay talong (aka purple) yun tint ng Corolla namin. But careful with the fakes out on the market
As for how the tint is, I used to prefer a darker tint for the sides and kept a light medium tint for the front. But yun last tint ko ginawa ko nalang medium all-around. I could still see pa naman sa gabi unlike my sister-in-law's super black... ayun talaga kilangan babain yun windows during nighttime parking.