Advantages: friendly host. Good communication. Apartment with very good location to explore Manhatten.
Disadvantages: bad or no ventilation,very humid, especially in the bathroom. Two windows through which u can touch another buildings wall. So literally u dont see is it dark or light outside. Laundery is just next to your door,so prepare to hot and humid air while entering and leaving the apartment. Dead rats around the building.
In general not bad if u just want to sleep over while exploring NYC