Remember, you're buying a service policy, not a warranty, no matter what they call them. The only way you can buy an extended "warranty" is from the vehicle manufacturer, and not many offer them.
The contract will spell out exactly what is or isn't covered and the requirements to file a claim.
Some people like them, others find it's cheaper to self insure like we do.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '05 Odyssey