The core plot is competently done, but there are a number of things that don't work. First, Cole makes Ben a racist, and then this vanishes the moment Polly reproves him for it. This is too big an issue to be dealt with so casually. Second, there is a long section where the narrative is divided up between characters, choose-your-own-adventure style. I simply didn't have the energy to play that game and just skipped to the next section. Finally, it may have just been my low energy levels, but I found ten supporting character too many to keep track of.
Having said that, Cole does a decent characterisation of the fading First Doctor and a very good Polly. But I wouldn't recommend this to non-fans.