you have to learn how to ride the twin disc. you cant pop it from a stop light because it will be very rough. they say you need a pedal stop with the ptt, but you do not. you can adjust the clutch to a point where it is not needed, and I have not used one on my car in 2 years. i had the quartermaster clutch before than and they are both good, but I would have to go with the ptt for a better driving clutch. remember, the owner of ptt is a guy who worked for quartermaster for a long time designing their clutches, and the ptt twin disc is a newer, better, redesigned clutch.