Fantastic movie! yes it requires your attention being 2 1/2 hours long. I think I appreciated this more being someone who is just so sick of the re-boots and zero originality anymore. Every scary movie is the same thing. Jump scares. Midsommar is a movie meant to mess with you, make you uncomfortable, and at points make you wonder why your watching it. I enjoyed the originality. Finally something different. And yes you need a strong stomach and an attention span for this film