I've never bought an Eyewitness guide before. They've always seemed lacking in information and just overly glossy. More tourist then traveler. Then I realized that I rarely read all of a 1000 page travel guide.
The Eyewitness offers a quick overview (more pictures than words), so I can go off and do my own exploring. Maybe I just don't need all that text in a regular travel guide.
As it turned out, the Eyewitness was good for knowing whether or not to bother with some of the tourist stuff. The hotel and restaurant guide was good, but for that I might consider the Time Out guides in future.
My rating: Quite useful