I have the tune and a sprint booster. The sprint booster alone helped with my throttle response. Now with the tune, I don't even notice it. I have 1.8 AT. The tune will give you that pep you need. You can try the sprint booster as it is a 30 day money back guaranteed. I also found mixed reviews but if you analyze the negative reviews they are individuals who are stating their opinion as a fact. They have never tried the product to past judgement. I figured what is the harm in trying it, if it has a guaranteed. Well lets put it this way - I kept it. Cheers.