I bought the euro tune a while back with my car stock. I felt an instant increase in TR and power. also rpms felt like they dropped faster for quicker shifts. MY ONLY ISSUE WITH THE TUNE, mid way of rewriting the ECU, the gentleman on the phone(I forgot his name) told me that my batter wasn't at a great enough state of charge and that the rewriting could not be completed unless I ether jumped the car and had another car supply battery or I bought a battery pack to supply a charge (which I couldn't do due to low funds and no other vehicle to go out and purchase one). I ended up finding jumper cables long enough to reach from rear of car to batter n had a buddy supply me with enough charge to finish the process. YES, this process was lengthy due to this issue I ran into but in the end it was WELL worth the $300 for a lifetime tuning supply at my own pace