LIKES:
Decent cinematography
The acting by the younger generation was better than the older actors/actresses
The best acting was done by Jeong Ji So as Baek So Jin.
Production was okay.
Special FXs on Jeong Ji So were good and for the twisted ones.
Music didn't stand out or wasn't memorable, but worked throughout each scene.

DISLIKES:
- very slow paced, had to push myself to finish watching it.
- the ending we could figure out after the 5th episode, it was so obvious
- the whole FOREST thing was super lame
- Was Jin Her and the cop dating, a couple or married? They seemed more like friends, but even barely that
- the writers got lost in their own story, then tried to throw together an ending and failed to make it have any impact.
- the director too, had the actors wasting time and not showing enough emotion when it was needed.
- It wasn’t scary or a thriller, because there was no real plot twist

OVERALL:
I don't recommend it, was a waste of time. I wont rewatch it at all. I might check out other shows/movies by actress Jeong Ji So. Mostly it was just boring. Barely made it as a 5/10.