The writing, visual and thematic aspects are superb. The game is especially believable in this right because I grew up in Britain and many of the personalities, characters and vibes capture my experiences with remarkable narrative precision and realism.
I feel the game is let down by its technical elements, however, in that many NPCs behave in a clunky and underwhelming manner during gameplay. There are many technical issues to speak of and a general lack of direction in terms of the actual gameplay itself, it comes off as a culmination of generally popular ideas like stamina, hunger, survival, etc. although fails to explore any of these beyond a simple level. The game similarly introduces its own unique ideas such as conformity and managing drug consumption, but these are also minimal and underwent virtually no development from their existence in early access.
All in all, I believe that the game's quality is extremely mixed and that you have to play it selectively and choose the better portions to experience it to its fullest. It does not feel like it has lived up to its promise due to the lack of funds/time/development and that the content has been spread thin in an attempt to make a fully-fledged, story-based game. In one case the developers had explicitly lied by proposing a Wellie Mode in which you are able to choose a civilian archetype to play as (Doctor, Bobby, Wellie for example) in the Kickstarter, although this was reduced to only being allowed to play as a single Bobby in an arcade game mode instead of what was described. The reason given on the Steam forum was that it was too complicated to integrate it fully.