I haven't seen it yet, but I have heard that while it may have some good arguments, it also has some really poor ones that are too speculative and thus far less credible, which makes the whole movie easier to dismiss.

I watched them all and it was pretty instrumental in solidifying my thoughts on the futility and unreality of religion. Never looked back.

I ain’t got no none need for no video for me to say I ain’t got none belief in no JC.

While I was already an atheist when I watched it, it did provide a bit more background on myths I wasn't as familiar with. Made it easier to point out the glaring similarities between the religions, minor or major, and describe how they explain natural phenomena. Doesn't seem to sway the devout, though. They see it as the devil.