OK, cinematic and suspense but not really entertaining

Rating: 7/10 (12 February 2020)

My impressions are following:

It is quite dragged. (Despite being curious about how everything is gonna end we had to stop and watch the last 30ish minutes of the movie the next day. I was not sleepy, just fed up with watching it.)
The major flaw in the plot, as I see it, is that 4 extremely capable and adaptable people are living in an basement, starving and struggling to survive. Another thing is that the husband of the first housekeeper would have died starving in the bunker, without even attempting to go out and get himself some food, despite the fact he was not locked in, if his wife had not showed up after many days to check up on him, finding him all weak and hungry. And how did Chung-sook manage to clear all the mess so that the Parks did not notice anything if not when they arrived then when they woke up in the morning?
The movie has quite a suspenseful plot, nicely done, but asides from that it is just not entertaining enough. And here I found myself divided, on one side really wanting to see what is going to happen, and on the other side just dying from boredom because despite of all of the happenings it is simply just not entertaining.
As for the cinematography, I liked the movie. It is nicely filmed, nothing spectacular, but fitting and suitable to the plot. I especially liked the flood scene when Ki-jeong is sitting on the toilet, that was hyper-realistic and remarkable.
Altogether, okayish, I would give it a 7-star rating.