Finally, the review I wanted to get to: Space Marines Apocalypse Formations. If you are interested in the special rules for these formations, or what models you need to bring to qualify, then click the link below:
I can tell you that bringing a full battle company of marines is just great. They really give the formation a cinematic feel for what space marines are supposed to do. This is something that I've noticed with a lot of the formations in the book: the armies actually playing like the fluff tells us they are capable of, but are often limited by balance rules in the game itself.