So far as the SquareTrade warranties go, I can highly recommend them!
Last year, bought a Kodak ZX3 camcorder, refurbished, with a 90 day warranty, and added a SquareTrade warranty onto it. Six months later, the camcorder started to malfunction (would turn on, then immediately turn off again).
I was pretty peeved, since it was just a week or so before a big family vacation, that I wanted to use the camcorder on, but remembered the ST warranty. I made certain I registered the receipt, and put in a claim, then called ST to ask how long it would take to get the warranty taken care of. The CSR I spoke with okayed it immediately, sent me an e-mail with instructions on how to send them the camcorder, and authorized a pay-out right then and there (wasn't worth it, to them, to try to repair it). They also offered, if I wanted the refund in the form of an Amazon gift certificate, to give me an extra 5% of the value!
Highly recommended company!
Also, if you sign up for their e-mails, they regularly send out 30% off coupon codes, good for one day, that then turn into 20% codes for another week or so. For Black Friday, they allowed users to register for 40% off coupon codes (they sent out two of them), and they mailed me a post card, that I received yesterday, that gave me a few more codes good for 35% off.
Did I mention they're highly recommended by me??