from personal experiance, I think limo tint is too dark, Driving at night (especially wheeling at night) it becomes VERY hard to see unless the windows are open (I usually wheel with the windows open though).
35% looks way to light, you might as well not have tint on your car.
I think 20% is the way to go.
Limo tint (my old car)
and 20% almost looks the same as limo, but you can see out from the inside