pretty great article. I had a pretty awful experience that is related that I'll share.
My lady friend needed a new laptop for school, so I went to walmart and got her one of those netbooks by HP. As I'm buying the laptop the sales guy asked me if I wanted to get the extended warranty to cover "most wear and tear". Specifically he told me that I should get it, because a few of the HPs have a problem with the display failing. I ended up getting it.
Less then 4 days later, the display failed, with half of it going black. Went into walmart to return it, they refused saying I "stood" on the laptop and that's why they screen failed. I explained to them about their sales person explaining the warranty specifically covering this and that I had paid and extra 60 dollars because of it. The manager was called in, which clearly had a speech planned for when this happens. An hour of complaining and yelling and arguing and I end up leaving empty handed. I filed a complaint with the BBB, and received little help.
The laptop ended up becoming essentially a desktop with an external display. 3 weeks later, the keyboard failed. At this point I'm livid and called HP. Again they claim that I spilt something in the laptop and refused to honor my warranty.
Long story short, watch out for these places. HP and walmart will never get another dollar of my money.