I like the instant responce of the sprint booster in combination with the wave-trac too. I think it is just a personel preference if you like it or not and maybe has something to bo with what you are use to. Nick and I switched cars at the last Dragon and while I was very impressed with the 55 especially the brakes, Nick couldn't wait to get out of my car, muttering something about uncontroable throttle.Howard on the other hand enjoys driving my car as it is set up close to his.