The clock aside, I'm pretty sure I read somewhere that at nurburgring, a sport chrono car without pasm was 3 seconds faster than when not havibg it on. Thats obvious to me since if your throttle and transmission engage quicker you should be able to do a lap quicker. From my own experience clock aside ( I don't even notice it) having the sport butoon changes the car, the throttle sensitivity is awesome and you even get a throatier more aggressive sound coming out the back. I think the money is well spent and you will soon get over the clock.