I love my warranty's, If you can get one through your financial institution they are usually pretty cheap and they cover the basics like engine components, brake systems, differentials and transmissions. I got my extended warranty through my bank and it was 360 dollars for the life of my loan up to 100k miles. Having an extended warranty helps me sleep at night. I have driven 2 cars up to their braking point and had extended warranties save my bacon.
I say if you can afford it and its less than 5% the price of the car then I would go for it. Just so you have the piece of mind.
13 WRX Hatch - Cobb OTS Stage 1