I got this game in the PS Move Mayhem bundle over the weekend. I'm finding myself enjoying the multiplayer far more than I expected. Normally I don't play much online, especially after getting the online trophies for a game out of the way. But I have put in a good amount of time in MP even after getting the online trophies done.
The cool thing about it is the stealth options. Being able to infiltrate, which allows you to hide in plain sight helps rack up kills on the unsuspecting. Cloaking as a marksman helps with that too. There aren't a great deal of players online anymore, but the numbers are okay. I would imagine the DLC maps are pretty barren at this point, but who knows. I might pick them up and go for 100%.
The campaign is decent, with some cool weapons which would be awesome in multiplayer (I'd love to use the boltgun online).
It's a pretty good pickup for this price.