[Templar]

I have 35% on my AW and sometimes think it isn't dark enough depending on the light outside.

It depends on your interior color as well. I put 50% up on my AW just to see and it was barely noticeable. You do 70% on a black car and IMO you won't even see it, especially if your interior is a lighter color. It's all personal preference, but with 70% I don't think you'll even notice it is there.