I bought it this sale and It's worth with the reduced price. I have only played predator (unlocked all its respective achievements :D) and a couple of games of survivors. Sadly the community is very small...and you can't get that many games. I sincerely hope many players get this DLC so the community can grow a little more. Still...you can create a session and invite friends if it gets difficult to find a game.
If anyone's interested, my GT is on my sig if you wanna arrange some games and hunt for the achievements or just for fun.
XBox 360 Gamertag: Rol X box360 PSN ID: OvO_Nyctea_OvO