Tint removal on the doors and side windows isn't bad at all. Start in a corner and pull. If glue residue is left behind use a brand new razor blade and ammonia to get it off. Make sure to be careful and not get any ammonia on your interior panels! Take your time and at a minimum use 3 to 5 razor blades per window. Make sure they are new and have zero defects so that your windows do not get scratched.
Once your finished mix in a spray bottle 2 drops of dawn dish soap to a half gallon of water for clean up.
The rear window I would let a professional take care of or replace it. It is a major PITA!