Having read the other reviews of Virtual Light I felt it best to throw in my pennies worth. First, lets all just agree that William Gibson is a great SF writer. NO, just agree, it'll be easier.
Lets also say that Virtual Light is not the best place to start. Most of his books are set in the same near-future setting, and interweave delicately with each other: part of the fun of reading a new Gibson novel is spotting the characters from previous works who occaisionally pop their heads into the plot, either for a guest appearance or for a more starring role (anyone who's read them will remember Molly, in all her incarnations, as being one of the most memorable...). But that's just the point. Unless you've read all of them, starting at Virtual Light might be too much effort. Start at the beginning, with 'Neuromancer', which is, on it's own, both one of the finest cyberpunk novels ever written and the ideal starting point to get to grips with Gibson's writing style.
The first Gibson book I read was Virtual Light, and I have to agree with one of the other reviews here: at the time, it seemed rushed, too flaky, too insubstantial to take in. Then I read Neuromancer, realized they were something of a series, and got the lot. I have now read them all, and while they do vary in content and quality, they all have a particular fast-paced atmosphere that reveals him as an accomplished author. Virtual Light suffers in the same way as Count Zero: if read as part of the whole, they are each a wonderful, engaging dip into Gibson's intricate near future; strange, twisted tales of losers and winners wound round the plots and concepts that will draw fans in further and further...if read on their own, they may seem too distant, so take my advice and START AT THE BEGINNING!!!