I agree with M!. My wife's Infiniti has "tiptronic" too, but much like the Porsche system, its just a slush box with a manual option. I've driven the M3 SMG and it is smoother and quicker shifting (75ms) than the Maserati. My only complaint with Maserati system is the speed (or lack of) the shifts. According to Michael Schumaker he liked the Maserati shifting better than the Ferrari.