Well, you can definitely feel shades of Barbarian here- the marketing was not just smart to mention that, but it shows. Despite how you can tell what the premise is from the trailers, it doesn't make the reveal any less surprising, not to mention further reveals that I did not expect. There's a great message here about free will and control, but also how we try to manipulate others into believing that their lives only have meaning because of us.
It's a quick, enjoyable watch and great dark comedy with everyone giving dynamite performances. Sophie Thatcher, who I haven't seen in anything prior to this, shows great range as Iris, Jack Quaid shines as the unassuming boyfriend, and the rest of the cast leaves enough of an impression for you to get their motivations behind their actions. Would highly recommend.
Also, these people clearly never watched Terminator.