"Voice characterisations are too similar"
I managed to listen to 2 hours and 7 minutes before I had had enough.
The style of writing is quirky, so I imagine that it would be a challenge to narrate this really well. In fact the narrator does quite well with all the background stuff, its just the character voices that are not working at all. Twice in 2 hours I've not realised that a conversation between person A and B has turned into chat between A and C. This is entitely due to the voice characterisations being so similar to one another.