The apartment is exactly as shown in the pictures. We never met Dennis but Sen was very helpful and he gave us good advice about groceries and restaurants in the neighborhood. He also helped us storing our luggage for some time before we went to the airport.
As drawback we found the mattress not very confortable and the building is 80 years old so there are some inconveniences with the electricity.
We felt safe at every moment in Sunnyside and its 20 minutes away from Manhattan. There are stores, restaurants and 2 subway stations around the apartment.