It's fun viewing, but nothing too memorable; not awful or amazing, but pretty middle-of-the-road. The drama on Nerva Station, first in dealing with the "plague" and then with the invasion of the Cybermen, are the most engaging parts of the whole story. The storyline concerning the Vogans has some interesting seeds, such as the conflict between the two factions over the path their people should take and the use of gold as the Cybermen's weakness are interesting, but don't feel like their used to their fullest. There's perhaps a little too much going on in this story for it's own good. Having plotting between three different factions (including a double-agent!) can be an interesting story element if done right, but here, it felt like a case of too many cooks in the kitchen. (why didn't Kellerman just tell the other humans on Nerva station he was working with the Vogans in the first place if he intend to betray the Cybermen all along? Did I miss something?)

All-in-all, a very average story. It has it's high points at the beginning and end, but feels weighed down by the middle and the confused plot. I like the on-location filming and I would be guaranteed to buy a toy cybermat if it came in the design like in this episode.