This movie is a slow, dragging screenplay with no clear start or end. Honestly, I watched it on 1.2x speed to get through it faster. Despite the high reviews, I was thoroughly disappointed.
Several plot holes bothered me. Who leaves small kids unattended in such a dangerous situation? Apparently, nobody.
And who decides to get pregnant when even a slight sound can be fatal, knowing newborns cry a lot? Again Nobody with a brain.
The father's decision to leave his daughter who is smarter then the son with her mom, and chose to take his son instead, claiming to love his daughter later on - not believable and the mother who neglects her and doesn't even notice her absence until dark, is baffling.
The story raises many unanswered questions. Where did the water in the basement come from? What happened to the box's cap where the baby was sleeping? The father knew the creature's weakness but never used it; instead, he tried to sacrifice himself.
Overall, the story is lame, parenting is poorly portrayed, and there's no satisfying ending - just a bunch of unanswered questions and plot inconsistencies.