I have an extended service contract, and personally, I wouldn't be without one. Some people say take that money and put into some kind of account. I doubt many actually end up doing this. My contract covers 4 years of which I'm about 2 years into. I've had a lift pump replaced, ECM, and a plastic radiator tank. Considering the initial cost of the extended service contract, I'd be out about 1/2 of what I paid if I didn't have it. The main reason I have it, is in case of a major engine problem. I can't afford $20-30K out of pocket. Like any insurance, it basically boils down to a gamble. Me............I'm comfortable with having one, and wouldn't be comfortable without one...........cut and dry for me.
By the way, if you decide get quotes, I'd highly recommend Wholesale Warranties, they've been very good.