FWIW, there's a good thread in the "Shops and Parts Review" forum about the Tilton. Here are my comments regarding my experience with the clutch, mileage, and a maintenance inspection after about 10k miles:
I should also note, my nephew drove my car from Dallas to Orlando as part of a household move, and he had no problem managing the clutch inspite of never having driven a multi-disk clutch. However, I did spend some time teaching him how to deal with the short engagement travel of the clutch pedal, but it only took about a half hour for him to get the hang of it.
My car at full boost puts down about 840whp and 670 ft-lbs of torque. Consequently, I need a Tilton and have no regrets about installing one.