The story itself was a little weak, but I found it highly enjoyable.
I love the interaction between Charlie and 8 so much that for me it was worth getting it just to hear the two them together again.
The 3rd doctor was not very convincing, I could only identify one or two lines as being him.
Really it was another 5 doctors story and it highlights how difficult it is to serve everyone fairly, I think 5 and 6 had the best material and stood out above the other doctors.
I did expect it to be a bit longer as it was a 5 disc set. I haven't listened to the Revenants yet.