This is a really solid story about colonialism. I don't think it's particularly groundbreaking, but the message is clear and well communicated, even though both factions have a considerable depth to them.

The Kroll was surprisingly convincing, one of the best practical effect monsters we've seen yet.

I'm getting a little tired of Romana saying she's going to do something, then the Doctor giving her an order to do that thing. It was funny the first handful of times, but it's becoming annoying.