I got my STS-V tuned finally. I didn't get much more power that the Wait4Me tune that was on my PCM, but the new tune doesn't lean the engine as much and doesn't pull any spark. The Wait4Me tune did both, but in fairness I believe the Wait4Me tune was more aggressive because the gas is better in the midwest where the PCM came from. The car feels much more powerful than stock and shifts are quicker and firmer especially in manual mode.
Bob