I don't take these out on any item on general principle. The people selling them expect to make a profit, we have TVs, DTRs, a DVD player, a VHS recorder, a PS3, several radios, Cd player, a washer/drier, a fridge/freezer, an electric cooker, laptops, cameras (some of them expensive), two cars, three trikes, three bikes and several small gadgets. That's a lot of profit! The amount of money I've saved in not buying extended warranties on these would buy a small car!
However, we are retired and have some capital to lay out if something dies, if you have a car and nothing else maybe you should take the warranty, but the devil is in the small print and beanzontoast's post above says it all, the insurer decides on the vague clauses, not the owner!