Anything short of a nuke is too weak to take out a Mega Tank without suffering losses. Also, there's no Shadamar or Tauran campaigns. Gameplay's pretty good. The interface is fairly easy to learn. It takes a little while to get the hang of it, but once you've mastered it, your good to go.
Graphics are good, especially the explosions.
I like the Tauran Tanks. This is pretty annoying to say the least. I found the interface to be friendly enough, but the groups could have been structured better. Far too often you'll send out a group to make an attack, and only one member from the group will actually go. This is fine when you don't have many units, but once there are, keeping track of which ones had already moved and which ones hadn't became pretty tedious.