I bought the 2 year extension and 3 year service plan. It includes 2 new tires, 3 batteries and all the service.
In 5 months I have about 17,000 miles and the plan already paid for itself. I'll come out way ahead with it and I don't like doing all the service. I'd rather be riding. Last week they did the 16,000 mile service and it came to $470, all paid for already, of course.
But, if I did low mileage per year, it may not be worth it.
Tell your dealer you will buy it off the net if he does not discount his price.