Ok just got the prices, and holy crap we charge ALOT. 2 years is 199.99 and 4 years is 279.99
EDIT
Okay, so based on the average of about $900 for a retail D3, you are giving cc or bb another 20% (or more) for the chance that your quality system and or installation MAY fail in two to five years, assuming it starts after the factory one year warranty ends. Don't forget you're also paying tax, which now brings it past 25% of purchase price.
So if one is really concerned with the lack of quality of such an expensive purchase and wants piece of mind, the risk is better to hold on to the money and insure yourself. That's how I see it. Example:
Instead of giving away your money, you could put $199 in a minimal interest bearing account (say 4.5% ING Orange Savings) and collect interest over that same period of time as your extended warranty applies. Chances are better that your possible repairs won't exceed the price of the system, and you are ahead of the game.
So you get to keep your money and make money on it while you wait for your system to fail. You could also add funds to your savings account and save up for your doomed system to crash. Then, when three years passes, and you are stunned that you haven't had a problem, you have a wad of cash to jet off to Europe with and take a friend with you.
To add to the problem, most of us are bypassing the system to play video while the vehicle is in motion. Therefore, the system warranty and extended warranty respectively are voidable anyway. They can collect your $199 or $279 and never honor the agreement because we have spoiled the installation that they provided (aka we paid for).
Personally, I'd rather use the cash for something else other than to support a retailer that has bet that the system will NOT fail. Instead of betting that the system WILL crash (which is what you are doing when you buy these protection plans), I'll bet along with the retailer that it won't.
But that's just me.