Somewhat torn about this story. In many respects, isn't that bad, has some good humour in it, and a good introduction for the most part to Romana II, and the central plotline to it is quite an interesting one, with the idea of two logical races getting deadlocked in a war.
What detracts a lot from the story, even though a bit downplayed in the novel against the TV story at least, is that the Daleks aren't really a good race to be part of that deadlock, as prior stories have been quite clear that they aren't robots / robotic, can be quite emotional and willing to do illogical things sometimes, or at least the less optimal thing, and instead come across as strongly xenophobic, fascist, authoritarian and straight evil race, but not at all robotic.
So I think story could have been quite a lot better, if had the Movellans facing some other robotic foe, and even perhaps the Cybermen, who do go a lot on logic, would have been better placed.
It does bring back Davros, which in some respects is better for future stories, but he isn't the most well used in this book, has one or two good scenes with the Doctor, but otherwise is over the top as a mad scientist really.
Romana to being with seems to have a lot of scenes where screaming and helpless, but later on does start showing her stronger side against the Movellans, even winning a fight at one point.
K9 pretty much absent from the story, showing the continued issues in trying to use him right throughout his time on the show.
Overall, still an enjoyable read, but with some annoying parts, and could have been much better without the Daleks.