Positives:
Fantastic location next to Central Park, very friendly host, good communication, easy quick check in, everything was clean.
Neutral:
This is a proper original airbnb concept of someone renting out their spare room as opposed to the (semi) professional landlords that seem to dominate this site nowadays.
Negatives:
Lift didn't work at time I visited, unclear whether this is permanent or not but better check with host if you have luggage as flat is on fifth floor. I was traveling light so no problem.
Apartment complex is pretty rundown, prolly rent controlled building that hasn't seen maintenance investment in a while. But inside of apartment is perfectly nice/fine so really not an issue unless you care about that stuff.