ive owned a TT z before and had nothing but good come from the car, but im also a datsun/z/nissan freak so that may be why. They are not easy to work on , the parts are not cheap, but the sound of a high boosted TT is great. I would never buy one with a blown headgasket because you are going to get in over your head , and the NA cars like everyone said are big boats that are slow.