After several months, I was finally able to try BLK 513! I first heard about this store when they first opened in SM Megamall – unfortunately, I live far from there so I never really got the chance to go. It was pure luck that a branch opened up in SM North Edsa, which is nearer where I live.
My aunt and I were going to watch a film that day (Ang Babaeng Humayo) when I noticed that across the cinema area was BLK 513! Long story short, my aunt and I went to get some frozen yogurt.