Pretty poor
The story, concept and execution was all over the place.
Simon Amstell's character was an appalling decision, used only to add some extra time, the documentary talking heads was outright bad storytelling in trying to add realism due to the story being so dull, any synopsis of the film gave you the entire plot - the rest of the film was character development of some weak characters. An unhappy couple with their polar opposite daughters, their weird friend, and the crazy guy they meet and seemingly invite to live with them for the next 3 days.
It really had no story, I was waiting for something interesting to happen with the death but it never came and was truly underwhelming when he did die. Then I realised that the film was meant to be about an unhappy couple and how unhappy they were and thats just a really poor waste of what could be a decent black comedy, or mystery film or something.
Langham is a funny actor, he made me laugh a couple of times but the rest of the cast were poor, the script was fine and did ok with realism but there is nothing interesting about arguing couples who argue just because they dont love each other any more. Two people falling out of love is not an interesting plot.
The daughters were pointless, their friend was pointless, amstell was less than pointless, the crazy guy made no real sense and was thoroughly uninteresting or mysterious.
It felt like an overly long and incohesive episode of 'Doctors' or some other daytime ITV soap.