In general, we have found extended warranties to be a bad deal for the customer and have long advised against them. The most cautious consumers might want to consider an extended warranty for a repair-prone brand, provided that the warranty is both inexpensive and comprehensive and the cost of repairs tends to be high.

via Consumer Reports Money & Shopping Blog: Why you don’t need an extended warranty.

I find this to be true. Most retailers will try and push on you their extended warranties.

Retailers are pushing hard to get you to buy extended warranties, or service plans, because they’re cash cows. Stores keep 50 percent or more of what they charge for warranties. That’s much more than they can make selling actual products.