Moviesludge’s review published on Letterboxd:
This is like the plot of The Exorcist and Rosemary's Baby with a little proto-Poltergeist added in. Unfortunately this thing is severely talky and way overlong. There's a couple of excellent standout moments, but there aren't enough of them to really balance it out.
I don't regret watching it though, if for nothing else than the possessed toys scene. Oh yeah and then that scene where the dude is inexplicably harangued by a street band led by a dude with a flute up his nose.
Beyond the Door III (Amok Train) is my favorite of the series, followed closely by Shock.