Well, he's right about the Gospel Jesus (i.e. the mythic Jesus) being largely a midrashic construction. That's not to say it's not being hung on a guy who actually existed. His chronology is a bit off when he suggests the author of Mark invented him, since Mark is the product of an existing tradition, and Paul predates Mark by a generation or more. I don't think anyone with an understanding of the Gospels will deny that the figure they present is a mythic one and that subsequent traditions took that figure in a number of different directions, but that doesn't begin to address the question of where the idea of this guy came from in the first place. The problem is that he's actually not very iconic or archetypal until they spin him that way, and they spend a great deal of energy doing so and trying to warp Biblical prophecies and kingship theory around him to fit. What you see in the Gospels is not at all what you'd see if he had been fabricated specifically for that purpose; it's more that they're trying to take what's already there and morph it into something that suits their purpose.
As for the rest, he makes a number of fine points, but they're points that were made in critical Biblical scholarship more than a century ago. It's really only evangelical apologists who make the outlandish claims he's refuting, and in doing so they're already isolating themselves from mainstream Biblical scholarship.