I enjoyed The Diary of River Song Series 6 from Big Finish, and shared my thoughts in a review for CultBox. It’s focussed on contriving ways for River to visit all the past Doctors and while I think we’ve had that idea now, I did enjoy this set. Others may be less keen on seeing how the writers have sneaked River into the Doctor’s past incarnations.
Alex Kingston (to me) seems to have more relish for the part of River Song than ever before, and I look forward to many more series. My review is: The Diary of River Song Series 6 review.