Depends on what your after out of your tint mate, meaning you can go a cheap die based film for as little as $99 or you can pay the $400 for the metal based tint, wich is designed to reduce heat in the car aswell as giving the nice look ect! I just had my calais done in 18% from tint a car for the $400 (removing original factory tint aswell)comes with life time nation wide warranty against Fadeing,peeling,cracking,blistering ect and it has the metal tint, personally its your choice @ the end of the day mate, but i would fork over the cash and get the good quality tint! If you want a look @ the 18% click on my ride and check it out 2 see if it would be as dark as you are wanting, if its not then you will have no choice but to go the die based film as they dont make the metal based film any lower than 18%!