Chy's place was great - spotless and you can see she pays a lot of attention to the details. There was plenty of space for two couples, and the two bathrooms (one of them en-suite) came really handy.
I gave location only 4 stars because all the metro lines that go into Manhattan are 15-20 mins walk away. The neighbourhood itself is not the cleanest but we didn't have any issues or felt unsafe while walking home at night.
Not 100% sure about the situation of the building - it has three floors with three separate entrances. The host lives downstairs, this AirBnB is on the ground level, and there's another floor above it. Throughout the week we heard no noise from any of the other accommodations, but on our very last morning a group of people came to stay in the apartment above us. They kept pacing up and down while we were packing our things and it was really loud, you could clearly hear every floorboard creek. As I said this only happened on our last day so it wasn't an issue for us but I can imagine it's quite annoying if you keep hearing it for a week.
Overall we were happy with the accommodation and would be happy to stay at Chy's place again.