We had a great time staying at Harry's and Harriet's flat. We landed in Newark, so we took a taxi to their flat. It takes about 20 minutes to get there (depends on the traffic) and costs about 47 dollars. When we got there, Harry welcomed us and showed us the flat. They even had some snacks for us, which was very convenient after such a long flight. The flat was very clean and cozy.
We spent most of the time in NYC. The next bus stop is just two blocks away from their apartment. We usually took bus 87 (1,60 Dollar) to Hoboken path station and then the path train (2,75 Dollar) to 33rd street or World Trade Center. It takes about 25 minutes to get to midtown Manhattan. You can also take bus 123 (4,50 Dollar) which will take you directly to Port Authority Terminal. Supreme supermarket is also just one block away from their apartment.
We would really recommend staying with them.