I can't believe that this article doesn't mention the simpliest of devices that can be purchased anywhere. It's a wonderful thing to be able to test ANY appliance in your home or apartment to see where there may be ways to cut back. The "Kill-A-Watt" device sells on newegg.com for only $18.99 + $1.99 shipping. In an article discussing devices to measure power usage, it is pathetic to see that the devices that most people would actually be interested in (and can easily afford to purchase) aren't even mentioned in passing. Out of a score of 100 points, I would have to give this article a 25---just for being so totally incomplete. With the Kill-A-Watt meter, I recently discovered that my Apartment's refrigerator was using TRIPLE the power that it should be using. It's old and the compressor was running almost constantly. With the information that the Kill-A-Watt provided in hand, I was able to show management why my monthly popower bill was so high---and they gave me a new refrigerator. Most people want a simple to use, inexpensive and accurate device---not some high-tech expensive device that can be both difficult and dangerous to install. How about a new Article that is helpful to 90% of all people, not just the 10% that insist on the very latest high-tech units?