"There is no doubt that the Reader is a huge step forward for eBooks. The screen is great, the battery life is superb, and it looks good, to boot. The device does a really good job of reading books bought from Sony's online store, too, provided you are in a well-lit environment. Many of the Reader's limitations, such as the performance and the RSS feeds, seem easily fixable via firmware. But until they are, it is better suited for early adopters than avid readers."
http://www.pcmag.com/article2/0,1895,1993561,00.asp
http://www.pcmag.com/article2/0,1895,2033190,00.asp
http://www.pcmag.com/article2/0,1895,1983663,00.asp (older video review)