Absolutely horrible. It gives me a headache just thinking about it.
Do you know those kind of games where it's so badly made and messy, that you start getting a headache? This is that kind of game. The graphics are awful, the sound effects cheap, and the gameplay recycled and unoriginal. I remember having units not listening to orders, terrible pathing, and uninspiring unit designs.
This game effectively beheaded this series. If they ever make a sequel for this game, it would have to be absolutely spectacular to resurrect what this mess of a game ended.