Staff, CEO, and dated writing aside (there were a lot of people that actually LIKED the writing/jokes when this came out), you will find a very fun co-op game with a lot of customization for your character available for you and a lot of ways to play. I really liked the Berserker class from the first game, and in this game they have two classes that are very similar but utilize the game mechanics in a well thought out way. Looting and doing giant firefights in this game is a very fun thing to do, especially with friends. There were countless times where there would be answers to certain enemies for me but not for someone else and vice versa, so the co-op aspect of this game really shines through. The higher tier items and endgame equips make a lot of the game pretty easy, but overall I would say between the slaughter arenas, all of the missions in the base game and the DLC and the endgame/secret bosses, you may have one of the best co-op games ever created.
The reason this gets a 4.5 from me is because I can't rate 4.6/4.7 and the writing/voice acting does get a bit bothersome. The game is very fun and that is what matters most.