I live in the South Subs of Chicago,IL. I had my windows tinted 35% (Legal) all the way around (Black GP). It's not extremely dark but in my opinion is perfect. I'm not a fan of the super dark tints anyways. They used Madico film. It was kind of expensive but it's a very reputable company that has been there for over 30 years. It came with a lifetime warranty. So if any bubbles, dis-coloring, peeling, etc occurs I just have to bring it in and they will fix it no questions asked.