We bought the warranty after the dealer's "closer" dropped the price from $4000 to $1700, never made a claim. The dealer did not provide a copy of the warranty policy or contract at the time of sale, had to ask for copy, read the fine print full of exclusions and requirements for having written proof of all manufacturer recommended inspections and services for all appliances, etc.
Your individual appliance, devices and housebox, etc warranties are good for three years and your cutaway van/chassis is usually warranted for 6 years or 60K miles whichever comes first before your extended warranty kicks in.