I'm an atheist but I found it to be utter garbage.
Richard Dawkins is an absolutely BRILLIANT evolutionary biologist who can expertly communicate even difficult material in a way accessible to most people.
However, as a philosopher and theologian, he is an unarmed man in a battle of wits when the opposition is armed with nukes. "The God Delusion" spends a chapter of him essentially claiming all religions are like Christianity, then spends most of the rest of the book lamely bashing Christianity, and then weakly concludes that since he's "disproven" Christianity he's disproven all religions.
Christianity is false, patently so, but Dawkins should stick to biology. He's good at it. He sucks at philosophy and theology.