I've never bought any sort of extended warranty on anything over the decades. Not on cars, appliances, electronic devices, etc. I figure I've saved thousands, and have almost never had something fail inside the extended coverage time anyway. I figure if it happens now and then, I'm still way, way ahead of the game.
Now, if only I hadn't had to pay auto insurance for the past 43 years. I've never made a claim, and I could have bought a house with those premiums!