Strangers from hell is such a good series for people who are looking for a thriller type of kdrama. If that's your case, then you're 100% be interested in this series.
The dark cinematography is not something that I usually enjoy, but it fits the story so much that I wasn't even bothered with it.
Even though some scenes might be very disturbing, I think they are what makes this kdrama different from other thrillers.
The soundtrack is on point for every scene and the characters are very well structured. There are little to no plot holes and everything fits like a big puzzle.
The only reason why I gave this drama a 9.5 of rewatch value instead of a 10 is because NOTHING equals to watching this for the first time, even if the series is still awesome on the second time you watch it, there won't be that feeling of surprise at every scene anymore.