The only thing that I can think of is the story mode. The stories are not that enticing to play, and doesn't have much twists to it.
You can play this game by yourself, over a Local Area Network, or over the modem. This makes it so versatile. You can play up to at most 8 players without sacrificing game speed and graphics, which are definitely specific factors that people look for. The animation of the units are really great! It's just like watching an adventure game on a strategy platform.
The units are not entirely polygon based and the rendering is smooth. This makes it more pleasing to the eyes. The environment is really interactive! You can cut down trees when you are fighting and you can push rocks over cliffs to land on your opponents. It's quite realistic..
But whatever you do, DON'T LEAVE THIS GAME ON THE SHELF! It's a definite MUST-BUY! I guarantee you, you'll spend several hours playing this game and you won't get tired of it.