The nitpicking from users reviewers is moronic.

Rating: 10/10 (11 July 2018)

A Quiet Place is a fantastic thriller; full stop. Excellent pacing, acting, tension, and heart, it has everything you want from the genre.
What I don't get is the nitpicking from people who think this movie should have been 3 hours long with all the lore spelled out. Given that the characters can't, you know, talk, how would the director convey this information without it coming off hackneyed? A Bruckheimer/Michael Bay explanatory moment would cheapen the film.
Hint: It doesn't matter where the creatures come from, it doesn't matter why the international military couldn't stop them, or why they didn't know supersonic weapons destroy, or why they could kill one at the end with a shotgun, or even why the movie wasn't an extra hour long with a mini-Starship Troopers ending. NONE OF THIS WOULD HAVE MADE THE MOVIE BETTER.
Maybe there's some online fan-fiction that explains, like the Trekkies that speak Klingon. I don't know and I don't care, the movie stands up well on its own.