OrangeMSP installed a greddy in his car.. Same location, too. I was actually wanting to put mine in the pocket to the left of the steering wheel, but after seeing his, it looks perfect down there.
His only complaint was that it would increment the time without really checking speed/turbo usage. That means if he left it on and killed the car, the car would still run for about 7-9minutes, even if he only kicked in turbo for a little bitty amount.
Seems to both of us that'd do more damage than good. He "solved" the problem by turning the TT off right before leaving the car so it resets back to 1minute. *shrug* I do remember the TT having a preset mode, so it'll run a preset amount of time regardless of turbo usage. Using that you would be able to set it to run a few minutes, but I won't know for sure until I get my car and get it hooked up.