I have some very spoilery qualms.

Rating: 3/10 (22 March 2019)

I loved the start of the movie up until about the last... 15-20 minutes? Once everything starts getting revealed it really puts a stinker on the film.
Loved the dialogue and interactions between each of the characters. What I didn't like is how the movie is things with the "twist". Everyone in the theatre sees it coming based on the premise, the problem is it doesn't make sense now.
If our main character ACTED differently then I could see her being switched. The problem is that she just acts "scared" about this place. And somehow she has to be informed about the experiments.... Despite her being the one who was actually involved in them?
Further to this - if the humans abandoned them down below... How did ALL of those people just survive off of rabbits? How did they only know she was "special" after she danced? Not the fact she was screaming for her parents while she was handcuffed to a bed...?
Honestly this was a 9.5/10 until the ending. Now it's getting a 3. The movie itself does not make up for this lackluster "ending" if you can call it that.