I went into this hoping for something along the lines of Cannibal the Musical. But from the minds of Trey Parker and Matt Stone this is not.
It's funny in the sense that it's so awful. It's a sincere attempt at a film for the most part, but calling it a musical is quite the stretch.
It's worth a watch if you have an hour and a half you're willing to waste. The songs are awful parodies and are about 4 lines and it's done. There's some jazz poetry I guess that's somewhat ok, but man. So disappointed.
Some gore but nothing compares to other movies that are similar.
Overall, don't waste your time. If you want a musical, watch something else. If you want an ed gein film, watch a different one.