Ive only play for a little bit but have really enjoyed it so far. I'm surprised at how difficult it actually is to stay alive, you've constantly got to be doing things. It's still very early access at the moment, so there's no challenges or goals.....yet. I'm happy with the £15 it cost me, it's already better than the new cod, that's for sure.
Am going to make a thread about it at some point this week.