I had Wilkes chip in my 944S and that ran very very well. I now run a low mileage S2 and the guy I sold my S to, sticks pretty close to me on club runs, even on the long open straights. S2 has more torque to haul it out of the corners but on WOT there is not much to chose between the stock S2 and the chipped S. Also had very good sensible advice and back up service form Wilkes. I'm tempted to try his S2 chip too
