I'm surprised I differ so much from the general populace, I have really enjoyed this game and continue to do so!
All of this being said, I get the feeling a lot of the issues that people have put forth have to do with expectations. I had none for the title, all I expected was to be thrashing mobile suits in some of my own favorites from the TV series', and it does that quite well. However, the game could definitely benefit from an overhaul, a more free roam system that allows you to traverse between missions, and actually create a true battlefield style Gundam game along the lines of Mercenaries 2's open-ended game play would be brilliant.
I would recommend this game to anyone who, like me, finds it easier to overlook shortcomings if the game is just plain fun, and to me this one is.