For me, and extended "warranty" isn't necessarily a bad thing. If they worked like they are supposed to. I know some folks will say they are not worth it, that they owned their RV for X number of years and never had a problem. This is true, but I view an extended "warranty" as I would health insurance. If you never have to use the health insurance, was it a waste of money to have health insurance?
For me, the rub comes in for 2 reasons. 1) They are usually way over priced, a nice profit center for the selling dealer. 2) Almost all of the stories I've read on the various RV boards I frequent, indicate these "warranty" companies do every thing in their power to deny coverage.
That's why I would never pay for a 3rd party "warranty".