Just beat campaign on blood angle or whatever difficulty, excellent game, solid mechanics, punchy weapons ( on lower difficulty) story is solid. Music isn't bad, overall great game, cons, controls and servers are fidgety at times, some mechanics need ironing out, and most of all, although optional, don't play campaign on max difficulty as there is no trophies or rewards, better off enjoying your experience, the veteran mode I tried with my buddy is highest id recommend as it's that extra challenge. So far 12 hours in those are my thoughts, if it becomes relevant I may review multiplayer in order to help out those on the edge.
Quick overview: 4/5 on release isn't bad.