ya dont do it yourself. a place by me did a friend of mines acura vigor (4 door) for $128 and lifetime warrenty. they removed old tint, did 35% all the way around and a 6 inch banner on the windshield. the defrosterlines have no trace of any bubbles and looks just as good as factory tinted glass.

i would deffinately reccomend getting it done professionally, that way there will be better results and a lifetime warrenty(at most places check on that first)