I can understand why it could be criticised (for example, I wasn't that impressed with Clemenza's death, it wasn't at all as I imagined it would be, and Fredo being gay is just bizarre), but I think the personal attacks on Winegardner are a bit harsh. I imagine he was bricking it when it came out - sure, it can't touch the original book, but it ain't that bad! Without wishing to be cliche, it's business. Not personal.