I spend ages playing this when it came out - it may lack the cut-scenes and plot from its C&C and Starcraft contemporaries, but it more than made up for it in innovative features - queuing commands, radar warfare with scanners and jammers, workable defences including artillery worthy of the name, the wonderfully animated hordes of unit types done in full 3d....
Awesome.
And it still scales brilliantly on modern computers - more units, bigger maps, more annihilation!