I really dislike the Mountune RMM. Feels exactly the same as the stock 2018 but squeaks and creaks like an old door, no matter how much grease you slather on it. Doesn't cause any vibrations, just makes the transmission sound broken.
But, I love my quick shift and the service I got from Randy doing my tune was very good. Overall, I am happy with my investment, but I wouldn't recommend the Mountune RMM.