Considering this episodes reputation, I was actually really surprised about how much I liked this episode.
I'm a sucker for any kind of renegade Time Lord, and getting the Rani and the Master as a double deal just was a total pleasure to watch. The two of them - and especially the three of them, whenever the Doctor is there aswell - are just a really great combination.
The story itself was also more than fine. Nothing that was shockingly innovative, but the plot did it's job in functioning as a plot, and that's all I'm asking. At times it definetly dragged a little, but nothing that bothered me too badly.
Overall, probably my second favourite serial of the season!