It's a good movie, but disturbing. A bit like Clockwork Orange one might say... a well-done movie, but not necessarily fun to sit through. Not as gory in most parts as you might think (much more geared towards suspense), but some parts are so weird or twisted that they're hard to forget. So I wouldn't rate it as a "must see" if one isn't into horror or suspense, but if you like that genre then yes it's worth seeing. (Or if you just want to know what kind of scene Kimi the Brony familiar is referencing... 😉)