Hey guys I'm thinking about getting MAG since it's $30 now and has Move support. So any tips for a guy just starting off? Also any etiquette I should know for the game like Starcraft 2's gg? 

Well if you can you should try and find a clan to join, maybe look around on the official forums. A lot of the people playing now are pretty damn good at the game so don't expect to own everyone like you would in COD.

Get a med kit asap and equip it, as it will let you revive your teammates. You'll get a lot of XP for doing it, and it'll keep your team in the fight. Also, keep an eye out for what your commander has flagged as a target for you to deal with (upper left corner of screen). Going off solo will sometimes tick some squad commanders off. 

Get a couple hours free to download the updates... took me almost two hours overall putting it in the first time.

I figure I would bump this thread instead of making a new one. I have a sealed copy of MAG, is it worth cracking opening and playing after all this time? 
 
Follow up question: If so does it matter which faction I pick? I remember at the start, they were unbalanced.