I plan on keeping my MS for over 8 years, so I did get the Service Plan. At the time I had to get it at the time I took delivery, so I pulled the trigger and baked the cost into my financing. It has worked great. I like getting the annual service and not paying anything now. I will be getting the extended warranty when the original warranty expires. That is really worth it. Just replaced my entire drive unit with only 35K miles on it. No muss, no fuss. Just did it. Many would debate the warranty extension. Personally I see it as another level of car insurance.