Good, but not great.
The biggest letdown to me was the multiplayer. It's not that good, if you ask me. Maybe I'm just spoiled by other shooters. I mean, it's not bad, but there's lots of other far better multiplayer shooters out there.
The campaign was fun though. It's fun to play around with the different weapons and their different abilities. I would recommend getting a used copy somewhere and playing it, then trading it in for something else after you finish. Or renting it.