I've been enjoying them, but not as much as the last seasons. For me, Clara lacks the interesting personalities of the previous companions. She's got spunk and she's pretty, but so far that's all there's been to her character. I am interested to see her mystery solved, though.
My favourite episode this second half of the season was "Journey to the Centre of the TARDIS," where we finally get to see more of the Doctor's beloved ship. It made me happy that we caught a glimpse of the pool and the library. I've always enjoyed the fact that she's somewhat of a living thing.
Looking forward to the finale that airs tonight! It is called "The Name of the Doctor," so that bodes interesting. Plus, you can catch a glimpse of River Song in the trailer; she's my favourite and has been conspicuously missing from this half of the season.