Ben Stevens’s review published on Letterboxd:
This movie was exactly what I expected. Not good at all but pretty funny and entertaining.
There was so much random elements inputted in this film. M3gan just starts singing random pop songs, and the dance she does in the trailer has absolutely no context in the actual film. She even plays Like Toy Soldiers by Eminem on the piano for like 10 seconds for no reason.
Anyway, if you think you might find this fun, then it'll probably live up to those expectations. If you're looking for a good horror movie, don't bother.