The series are pretty consistent, if you like Season 1 you will probably like it through to Season 4. I found I struggled more with Season 5 and left it a long time before finishing. Some characters, suddenly seemed to be different, and there are points where audio issues disrupt your listening (e.g. two characters travelling in a vehicle, one voice has echo the other does not). As well as enjoying the audio drama itself I also enjoyed the film review bonus episodes.