Well I speak from a position of knowledge. First off, if you buy a new vehicle, decide if you are going to keep it past 3 years. If so, look at a known warranty product. We sell Zurich, they cover, do not have arbitrators come in and inspect the vehicle, you not do you have to keep records. Generally speaking warranty companies that do that, are looking for preexisting conditions to NOT cover repairs. Or find fault by you by not maintain proper care of the vehicle.
Second, if you buy a used vehicle, if you are going to keep it, you are crazy taking a "chance." I will write a extended warranty based on customers driving habits and time they plan to keep the vehicle. So I a customer drives 20k a year, a 6 year warranty is a waste. I will write something like a additional 4 year / 100k mile one. If they drive 10k or less, I will write a 7 year or so. Keep in mind the warranty also covers towing, lockout service, flat tire service, jumpstart, and pays the $100 PER hour labor rate. It is covered Nationwide, and you will never break down in your driveway, so it will come at a time of hardship. Piece of mind is worth it if wife or kids will be traveling without you or if you are not a wrench head.
One thing I do, and it really helps the customer, I will call the bank, negotiate a better rate, drop the customers rate a half point to help cover the payment difference. So instead of $25 extra, it ends up only being about $8-$10 difference, plus they get a better rate. Example, if the rate is 3.29% I will work the bank to get a 2.79% or so, then the warranty doesn't increase payment near as much, the customer wins both ways. Do not forget, if you buy a 6-7 year plan, if you trade the car or decide you do not want the warranty anymore, you can cancel it and get a prorated refund.
Some believe in it, some do not, but have a AC go out in July, or transmission or engine go. That $1200-$1400 will be the best money you ever spend. People will buy a $600 phone or $1000 lap top and get protection and it usually cost about 25% of the products value, but will spend $35000-$45000 on a car and not invest less than 5% to protect their automobile. Crazy.