Just being honest here The twist toward the end is great.
But the content toward the mid-late are really bad. The movie trying so hard to establish their relationship but it just wasted a lot of time that can be used to build the lore for the ''story''.
The main women actor doesn't have a memorable moment at all just plain reading the script.
The main character is so hot tempered that he become unlikeable character when we supposed to cheer on him.
The 2 kids never got any explanation on why they exist ,the lift being cleaned up in just the spans of few hours is ridiculous.
The script might be great but if the director doesn't have any idea on how to progress a scene without making people realizing the obvious plot this should be good.
Last but not least, using a high volume jumpscare when it's not a jumpscare is a cheap tactic and it cheapen the quality of the movie overall.
-Good watch toward the end.