On the whole, I found the book quite enjoyable, but that's largely because on the larger issue I tend to agree with Mr. Hitchens; I'm antireligious, think that belief in God has been both dangerous and foolhardy throughout human history, etc.
I found his prose style a little convoluted at first and almost put the book down at around page fifty. But as I got more familiar, it got more enjoyable and I finished it up last night.
His arguments are sound, even if I don't feel he went into sufficient detail on some points. Namely, a charge I often hear is the point made by some religious believes that there have been people killed in the name of ahteism and secularism during the Third Reich and in Stalinist Russia. Not that he doesn't address these points, but he first makes an elegant case that this charge is really nothing more than a logical fallacy employed by the religious claimant, basically a "you too" (don't remember the Latin phrase) ad hominem attack. I also feel that he could have made a better case against the Eastern religions that he seems to hold in equal contempt to Judaism/Christianity/Islam.
All in all, two thumbs up. I don't think it will convince anyone who isn't already a skeptic, but even so I learned some things I was in ignorance of. I'd recomment it.
Title: The Haunting of Hill House
Author: Shirley Jackson