I never considered an extended warranty on the vehicles I purchased new. I always said to myself that it would take at least 1 or 2 major failures to make up that extra cost. But, boy was I wrong. I wish I would have purchased one for my wife's Silverado when it was still available. In just the last year, the repairs I've had on the airbag system and front end parts alone would have more than paid for the warranty.
As long as I can afford it, I'm probably going to purchase one for my '07 Ram before it's too late.