I have to say yes, its great. When your upside down and when you roll back over , you need to be ready to go back down the mountian, just turning a key is better than trying to pull start your sled laying on your back!!!
i have a 2011 pro and the rpm will reach 8450 at half throttle. have to be carefull all the time. sled is completely stock. this is the only issue i have had with it. any body experience the same.:p i ride from 3000-8500 normally.