I have had the tune for a while. I was curious, if the software adapts based on fuel and air available. I'm thinking sprint booster is allowing fuel and air to come sooner in the power band. WOT should come sooner during launches and I'm wondering if power needs to be managed differently because of the changes made by sprint booster. I'm finding that the improvements made by the sprint booster give an unmanageable amount of low end torque. I was hoping for a small punch in the middle of the power band as well. I read that stacking them might have this effect and it's true. Looks like one or the other works great, but both are too much in a daily driver even at the middle setting for sprint booster. Perhaps the AT version will be better or one of the Merc Amg versions. BTW, I love torque, spinning tires and driving aggressively. The power application with mt version when stacked with euro tune makes the car less pleasurable to drive.