On normal difficulty its a bit too easy, I'm on mission 10 and I've only had one instance where I was a bit worried about my ability to finish the level (I thought I had wiped out the computer bases in one area but it had set up a small one, which I didn't notice, and then it swarmed my base and I only managed to pull my troops back from the front to defend it at the last second. My seemingly impregnable defences having been torn to shreds in a minute or two).
Would it kill RTS developers to devote another meg or two to the phrases uttered by units when you select or move them? The Space Marines (the army you play in campaign mode) have sod all variety in the units (you just tool them up according to the task you want them to complete) so you get to hear the same phrases about a thousand times.
Still.. saucy, I shall be playing this one online I suspect.