The only experience I had with a BestBuy warranty was my last. I was told their warranty covered everything and if something happened, I could go in, get a new one and be out the door. Reality was that they tried to say I had immersed it in water(which I hadn't) then they tried to tell me they had to send it off and I'd have to wait to get it back. I argued up the chain of command and an hour later I finally got my replacement, and they still acted like I was trying to cheat them!
OTOH, Squaretrade has refunded the full purchase price of two laptops. All I had to do was file an online claim, and send them a scanned receipt(you can add this before you have a claim). Both claims were approved within 3 days and I had the money in my Paypal account within a week. I had the accidental coverage on the laptops. I now have Squaretrade warranties on my video camera, both laptops, my Nook and our new tv.
Right now, you can use the code THIRTY30 to save 30%. I did a mock warranty quote on a $250 Ipod and the total for a 2 year warranty was:
$41.99 regular warranty price + $38.00 Accidental damage handling - $24.00 30% off code = $55.99 for 2 years and everything covered. Good deal if you ask me.