Hey Peter,
I've not had the pleasure of visiting there yet but I plan to in the near future.
I've gotten to know them quite well since buying a new Taurus SHO and being involved with Taurus SHO club -- and Livernois Motorsports is as much involved.
The tunes and tuner I've gotten from them is by mail and email tho I'd like to get the SHO there sometime for more definitive and precise tuning.
My contact there is Rick LeBlanc who is a great guy who cares about his customers and performance. They do so much research, modding and tuning on all cars there and have a great team.
Highly recommended people there.
Would love to hear more about your visits there sometime.
C.