I bought a used 1985 Chevy Caprice Classic wagon. It was gold colored. 
I got it from a new/ used Chevy dealer in Hicksville, NY back in the day. ( About…hmm…1988 IIRC ). It had, I dunno, about 20,000 miles on it. I purchased a bumper to bumper used car extended warranty that covered the drive train, etc. Went to 100,000 miles.
With less than 1,500 miles to go, the tranny died. I had the car towed to Aamco. They called the warranty issuer who immediately denied the claim. I was mighty pissed off. I insisted they send a claims adjuster in. Within a few days, a guy showed up who was based in Albany and was nothing except rude, abusive, doubtful, accusatory, etc. Said this would take no time at all to prove I’d tried to scam the insurance company out of a new tranny by pouring screws and bolts into the transmission fluid intake port, thus demolishing the transmission. Saw it all the time, etc.
I insisted on being IN the room when the casing was opened up. They removed the transmission from the car and sat it there the next morning. I watched them remove the bolts, with this guy still being every inch the triumphant dick.
Of course, I’d done no sabotage. At all.
When the casing was opened up and no foreign debris was found, what was found was one of the rotating elements of the transmission had cracked and flew apart at high speed and pieces were rapidly ground up into metal filings and bits. (That’s what turned the transmission fluid from that lovely clear red to a deep silvery gray ).
The guy stared at the casing and evidence. Wrote furiously on his clipboard. For quite a while. Shot a roll of film on his camera. Tore off a carbon page from the form he was writing on, turned and handed it to me and said, " you may be the only person I’ve ever met who was this close to expiration on a warranty who HADN’T dumped crap into his tranny. "
He informed the Aamco guy that he was authorizing a new ( rebuilt ) transmission.
So, IMHO, an extended warranty is worth EVERYTHING.