I respect it for trying something new with the Autons, and also it fits very well in the modern day setting (something so obvious that you can basically already predict where this story is going before reading it).
However, the plot itself is fairly uninspired. While I'm glad we finally have a story which does something new with the Autons in a world full of plastics and microplastics, it still amounts to the same old 'Giant alien thing wants to take over the world' end goal, which slightly undermines the experimental route taken here.
I also find, and no disrespect to him at all, Terry Molloy to not be the best choice for impersonating Sylvester McCoy. His Scottish accent was, to be frank, laughable. With an audiobook, I get it's hard to perfectly capture characters, but I almost wish he just hadn't done the accent, and the same with Ace, a lot of her enthusiasm as a character is really lost on his voice.
But still, I think it's a fair listen. Slightly pricey, but worth your time if you have any to spare.