Varying opinions. Some swear by it, and others dismiss it as not needed. There was a rental company out West that runs all EXCs and their bikes get flogged mercilessly, all with 10k+ miles and they don't run em.
Were I doing a lot of SM riding I might consider it, but linking trails together and the occasional jaunt to town like I do? (80/20) Nahh..
Wedding(s) = $30,000
Divorce(s) = $25,000
2009 Husky TE610