I see no opinions other than the first... I would like to hear exactly why people didn't like the book, but they wouldn't care to indulge us.
I've enjoyed almost all of the books I've read. Sure, some are better than others, but I've never looked to anything the Black Library produces for fantastic literature.
When I buy a 40K/Horus heresy book, I'm looking for cool environments, brutal fight descriptions, and a degree of cheesy epicness. So far, they have all succeeded.