I really liked this one.
I'm enjoying how this Doctor's attitudes have become a little more dispassionate and more focused on the problem at hand from a more pragmatic point of view...like say, the Third or Fourth Doctor would do in a crisis. His line about Clara being his "carer...she cares so I don't have to" was a great example of this.
I also liked seeing the Daleks be proper, threatening, exterminating, relentless Daleks again. Its been a long time since they have been "scary." When Rusty declared "malfunction repaired" I just knew that meant bad news, and sure enough - the episode suddenly turned.