We just met Alex when we checked in, but anyhow he had been a very friendly and helpful host. He was reachable anytime and answered my mails prompt.
The apartment was great! It was really beautiful and big. It has a perfectly equipped kitchen and there are also a few basics for breakfast and cooking. The bed is very comfortable. It is not that soundproofed as we are accustomed to (the steps from upstairs waked me every day - my son slept well, he did not hear it), but I think that is normal for american houses. But apart from this it is very quiet.
The neighbourhood is great! It is very authentic, people are friendly and helpful if required, no problems even late at night. We loved staying there!
In any case: apartment, host and neighbourhood are high recommended! If we are in New York again, we certainly return to this place!