So, I finally got around to finishing the Ultramarines Omnibus. Overall, I like the characters and found it fairly engaging, although I wish Warriors of Ultramar had spent more time dealing with how Space Marines deal with what they gave up by becoming space marines, but I can understand why that might hurt the narrative flow some. Black Sun, Dead Sky (Might be the other way arround) was a lot of fun, although I think my favorite characters were the Unfleshed; There's just something strangely sad and yet heroic about all they've gone through, and it still hasn't dashed their faith in the Emperor.
SpoilerI really thought Ardaric Vaanes was going to come back for a heroic redemption. I wonder if McNiell deliberately channeled Han Solo's line in A New Hope there to mislead readers.