As stated extended warranties can be a profit center for the dealership. The fine print can be a deal breaker, and if the warranty requires you to pay up front for work and seek reimbursement it seems all the more likely you can be turned down. These warranties are almost always negotiable. Don't wait till you sit down with the finance guy, negotiate as part of the sale. The $2200 can be cut down a lot, maybe 50%.
In my case we negotiated the price down and went for it. Within about 4 years the fridge went belly up. Dealer pretty much took care of everything, in the one claim alone we more then paid for our warranty between the cost of the fridge and installation. Then we had our converter go out, I was now ahead of the game before the warranty expired. Good investment? That's questionable, but coming up with the cost of the fridge/install right before a trip could have been a problem.