I've had no issues with my R-12x from a technical standpoint (guy before me caused some cosmetic damage is all). Just one thing, there is a dreaded Code 25 that is popular among these skis that keeps them from going above 3,000 RPM. Code 25 is supposed to indicate a bad knock sensor. However, 90% of the time, its a bad ECM component . This happened to me at the beginning of the season. There is a guy by the name of "GenTune" who can repair them quickly and pretty cheaply (Considering a new ECM is $600+). Other than that, i've thoroughly enjoyed mine. Very fast and very fun!