I really enjoyed it. Sorta weird seeing all the traitor legions loyal and praising the Emperor. I never read much about Horus as a participating character, but it was nice seeing him as a char before he was tainted. Also it was cool for me at least to see a few of more memorable chaos chars in the story aka Lucien, and Abbadon. False Gods also shed a lot of light on things, the slow evolution of Horus descending to his egomaniacle self we all know and love. I love the description of Angron near the end of the book. There really is to much about the series so far for me to pinpoint specifics, but as a whole I really enjoyed it. Looking forward to getting Galaxy in Flames tonight/tomarrow. I just love getting the whole background on the Heresy and how it got under way. In my eyes I think it all started because Lorgar got scolded by Daddy Emperor, so in a fit decided to burn down his Dad's house so to speak. But I may be wrong not having read the final book. Though I read the story of Lorgar in Tales of Heresy, which I think was the seed of deceit that started it all.
Again I may be wrong, these are the conclusions I have come to from the stories I have read. BTW, I detest Erebus and the Word Bearers of all the 40K armies, basically because of the books. But it's a fun sort of hate. I can see myself using the WB's in any fiction I ever write as the main and most hated anti-heroes.
Thanks for reading and any feedback/corrections are appreciated.