This is the game I choose to spend my $60 on instead of The Force Unleased. Simply put, if you loved AC 4 or any other AC games, this one will be good for you as well. Plenty of new parts to tune up, online CO-OP (finally), and more maps which some of them are MASSIVE. The Cradles come to mind here since its 5 giant planes that are literally on the edge of space with big gaps between them but small enough where I can sit on one and hit someone with a sniper canon on the next closest cradle.
So far my main problems is with the achievements, an example of one is to obtain 10000 wins online. Thats an insane number even by Halo standards and theres at least another 6 achievements like that one. So either A) they expect you to play online ALOT or B)they don't plan on releasing another Armored Core for a LONG time.