Great game, with possibly the best 'Blood for the Blood god' yet!
-Multiple campaigns, much like Soulstorm or Dark Crusade.
-Great Voice Acting, possibly the best in the entire series.
-New Last Stand map is hard as hell.
-Imperial Guard, that's actually really shooty for once. Although, it seems like the population cap for 'em is a little to low.
-Eliphas regains his badassery.
-Lord General Castor is a pimp.
-Ork....PIRATES. That's right. Ork Pirates.
-Multiplayer is still fun as hell.
-Blood for the Blood God! Skulls for the Skull Throne! LET THE GALAXY BURN!!!
Cons:
-Black Legion, with Failddon in this game.
-Some random, scattered bugs.
-All the Campaign missions are the same, with different voice acting for whichever army you chose.
-New Last Stand hero is hard to play as, especially if your new.
-Population cap on Imperial Guard needs to be higher.
-'Nid campaign is boring as hell, since you don't get nearly as much Voice Acting. Although the girl (Yea, it's a chick that does it) is a really good voice actor for the Hive Mind.
-Not all characters in the Campaign have voice acting, i.e Lord Commissar Bernn, the Eldar Farseer and the Plague Marine.