I use the RaceLogic Traction Control and it is fantastic. My best 1/4 mile time is 11.5 at 124MPH, and the TC makes my runs VERY consistent. It did take time to set up correctly but the data loging and graphing helped as well as Bernie the dealer I got it from. The high speed shifting allows for VERY smooth full throttle shifting! I will be happy to provide my current setting. The unit has a very fast processor and the control adjustments are so fast you can not feel them. The only indication it is working is the sound of the motor changing. Control in corners will scare the crap out of passengers when you floor it and the car will hold a perfect drift angle. My email is rroth@vitex.com