I just have one criticism concerning the voicework.  As fun as it is watching foreign LP-ers mispronounce the national bogeyman, I think it would've been nice to hear the protagonist correctly pronounce Manananggal at least once or at least have the grandmother say it in a flashback.  The fact that people call it the Maw-naw-nawng-gull is just removing the immersion for the rest of us hahaha.