I spend almost two month in the apartment and it really felt like home.
The apartment is relatively large for nyc, so there is enough space and it's also pretty cosy. It had all necessary utensils.
About the area: I really enjoyed Harlem, cause the people are nice and you can feel a community spirit. The people sit outside on the street with their chairs in the nights and listen to music. So it can be a little loud in the nights, but I enjoyed it a lot.
To be honest I had some very small bugs in the kitchen and in the bathroom, but that's nyc and there were bug spray.
The apartment is located immediately at the 6 train, less than 1 minute to walk to the station and appro. 13 min to 42nd/Grand Central. There are also a lot of grocery stores, delis and laundrys near to it.
About the host: I never met Kaz in person but he seemed to be very nice when answering questions, he was also very quick and really wanted to help me to improve my stay. Also his colleague who made the check-in was very nice and helpful.
I would defently recommend the apartment for people who really wants to live in nyc for a while. And I would book It again too.