To tell you the truth, I know everyone argues over Zaino or Klasse, but I feel you can't go wrong with either of them. I personally use Klasse on all my vehicles and am extremely pleased with the results. Zaino also produces excellent results and lasts a long time, as does klasse. Some have their opinions over "optical clarity" and "a chrome effect". I just want my car to be shiney, swirl free, and more resistant to scratches. I don't care about that other crap. I feel that both of these systems help hide swirls, last a long time, and make your car slightly more scratch resistant. I'm sure others will argue with me but I could care less. Good luck with either system. Btw, don't throw blackfire out of the list, I hear their polish is excellent!