I have read from various forums the pros and cons of getting an extended warranty, but I really needed the peace of mind considering these MKX's have so much electronics on it.
If you really want to obtain an extended warranty, I wouldn't go with anything but a Ford warranty. With that said, I found that Troy Dietrich at Ford of Greenfield in Greenfield MA had the best price out there. I even gave my dealer in the Milwaukee, WI area to match it and he wouldn't it.
I normally don't get extended warranties since I do all of my own mechanical -- (my '02 F-350 dually is going 178k strong), but if the navigation system dumps, that alone will cost me some money.
It's an individual thing, but wanted everyone to know where I found the best price.