I've read the book and found it compelling and persuasive, Prof Dawkins lays out a rational and detailed argument against belief in superstition, theism and religion in general. I encourage all who have not read this book to do so, you will not be disappointed.
I read it a few years ago. I thought it was good, but I don't remember much. I've read so many books about religion in the past few years that they became a blur. Bottom line...there is no good reason to believe in any god..especially the Christian god.