Pros
-property had an amazing view
-it was on the high end area
-spacious floor area
-smart home
-comfy beds
-modern building
CONS
-this is not a hotel so no hotel amenities
-no proper reception for the "hotel"
-no daily house keeping, there is 1 free cleaning if you stay for 4 nights or more, otherwise guests are to clean after themselves or pay for cleaning
-no toilet paper refills, no complimentary toothbrush, toothpaste etc.
-guests are required to sort out their trash, wash the dishes and are not allowed to make noise.
-no facilities for guests, no pool no gym etc.
Also, the surrounding area is a bit of the expensive side of Busan.
People in the building are a bit of a snob, this goes for the residence reception employees as well. People stare at you if you don't look high end enough (i.e. not wearing chanel).