Which tint
I agree with having the darkest. We had a car that was tinted & have recently changed cars. The new car wasn't tinted so we have gone for the darkest. One thing I really like is that it is really difficult to see into the car & so it is, hopefully, less tempting for theives.
Not that we leave expensive or personal info in there, but we can leave an empty bag in there without it looking interesting.
cheers
blossomoz