The way it works best is its theme, which is pretty in your face with the BPD splitting, the weak/loser FP not knowing how to deal with it, the ending with her at the center of the disaster and it not being her fault (classic), it's just a thematically accurate portrayal that also happens to be a movie that logically makes sense within its own stated rules. However, I personally did not really feel anything watching it because the plot itself felt kind of weak. I can't pinpoint it, I'd have to rewatch it and break down how things progressed exactly, but it felt too much like "wouldn't it be crazy if this happened next?" without much reasonable glue between each point. This perhaps ended up this way because of trying to make the theme work too hard, or because the writers are used to short-form skits, it just felt disjointed in an off way. I wouldn't say it's a bad movie, though, it just didn't really make me feel anything.