Loving it so far!
Was on with a bunch of americans and english last night and we had a good laugh as not all of them were too clued in as to what was going on.
If you have a team that knows what to do you will get on fine- if not, then you are screwed! this can be said for a lot of online games though.
Don't go expecting mind blowing visuals or sound as you'll be disappointed. They serve a function and don't detract from the gameplay, but aren't completely horrendous.
A good few have complained about the controls in regards to aiming- It is different to the usual COD movement but i've come from playing Battlefield Bad company and it actually reminded me of that, so i adapted easily.
There is slight frame rate issues here and there but nothing majorly off putting and it's not as if every game on the shelf has run perfectly.
I'm currently playing the acquisition mode and really enjoy it - an objective where you have to acquire 2 vehicles from the opposite team, aswell as the main objective you can take out their defenses etc to make the going a bit easier so there's always plenty to do.
As i've said before, if in doubt then wait for a price drop. With AVP and Bad company2 on the horizon it's going to be a great online feast!