It's OK. It is my second reflash: I got the October '03 reflash to get rid of the cold weather romps and no turbo boost if I let it idle before driving. In the process I lost the PI but retained the agressive T/H mode and mileage improved. Three years later I had it in for warranty repairs and without asking they installed the 06E17. The downside was a less-agressive T/H mode but mileage didn't change any. Given my pick, I would rather still have the October flash.