Some movies are so much talked about, you have to see it. This movie was made popular through the animation series Southpark. In the episode called "HumancentiPad", season 15 episode 1, Stan was connected to an Ipad the same way.
After this episode aired, everyone was wondering where Southpark got their inspiration, well, the movie called "The Human Centipede". And the movie went viral and became a cult hit overnight.
Yes, the acting is bad, but on the other hand, the effects are nice. Yes the story is thin, but on the other hand it's easy to follow. Yes, it's more gross then scary, but on the other hand, it do got it's scary moments.
If you really want to see the most gross, intense, well made movie ever, you have to see Martyrs (2008). See, the Dutch movies always are recognizable because they have something different, and that makes them always enjoyable.
