Wouldn't even have noticed there's a remake of that drama without your article. Thanks, Cho Na! 

I'm not sure though if I'll watch. I love Saint and Orn but the original was already scary for me and Thai horror dramas are usually more scary. T.T

 Cho Na:

Yes, I didn't watch the original, but the comments said that the zombies were scarier. I watched it during the daylight, lol.

That's a wise decision. xD Since they are locked in the building complex it's really scary and claustrophobic as you described. The Korean original felt that way too.