The best of its kind.
This game practically invented the genre, which is kind of odd considering the ridiculously pathetic games that followed it from the same company (C&C etc.)
The graphics are (for the time) really good, the gameplay is the most addictive I've ever experienced, the music is simply wonderful and the general atmosphere of the game is great.
I guess I can't hold it against the game (since it was one of the first), but controlling the units can be extremely annoying at times, especially because you can't control more than one at a time.
The Bottom Line
The game can still be acquired in shops for a ridiculous price -- get it! You won't regret you did.