Fantastic
This is a fantastic game, it is a hybrid of all the classic zombie games but a very likeable playable one. they have taken the key aspects of Borderlands, resident evil and nazi zombies and made it into a very succesful ARPG.
It has a great storyline and plenty of loot, missions are varied in style and can generally be completed in any order so it doesnt feel linear.
New game+ is also available to add additional replay value i have currently done it 4times and then there is a cheevo for completing act 1 with all characters! i got the 1000g some time ago as the achievements are not hard, yet i still continue to play, that is how good it is.
Some quick points
Guns and melee weapons avaiable
Borderlands loot system
Lots of zombies
Single or multiplayer start to finish
Masses of side quests
Masses of loot
Huge levels with minimal loading screens
The multiplayer aspect with friends will provide additional fun. i have been going for 80+ hours and still love it. I am still looking for the 'Defender of the motherland' and hoping for some DLC
A must buy!!