I got mine back today and installed it. Maybe 5 minutes to remove, 3 minutes to install- its absolutely no sweat at all. Look at the instructions on the White Automotive site.
I took the car for a spin to check it out. Seeing the light is not an issue, it is very bright at least at night. But catching the 1-2 shift on the light is going to be tough. It was about 50 deg outside and the car was ripping through 1st mighty fast. Even though the shift light is supposed to be set at 6200 RPM I still tended to bump the limiter. But I bet a lot of non-GTO owners wished they had that problem!
