I have read I think just about everything I can find on the Nytro MTX. Most of it has been positive. I am curious what negative things people have to say about the sled, particullary from people that test drove one or have a friend that has one and just do not care for it. I am seriously considering buying one but have ridden only two strokes in the past and am concerned about the "learning curve" of going to a four stroke. The engine breaking concerns me in addition to the weight. Here in the flatlands, we do not have the opportunity to test drive sleds really so I need to rely on the opinion of others. I would be coming off of a M7. What should I expect? I ride mostly off trail but still ride the trails enough that it needs to be trail friendly. Trying to make a decision this week to try the four stroke of stay with another M sled.