We stayed at Alex's place for a week and were very satisfied with it. The flat is exaclty as on the pictures, very clean and comfortable.
The neighbourhood is great and the PATH train station is only a few minutes walk, from where you can access NYC really quickly. You can find numerous restaurants and shops within walking distance.
Alex was an excellent host. We didn't meet him in person, but he was very kind, gave clear indications on the flat and transports and was very responsive when we had questions.
We recommend staying there to anyone looking for a cosy place near NYC.