Definitely Jack's place is highly recommended if you travel and visit NYC. This place is comfy, clean and well maintained. Its location is very convenient. A Metro stop is few steps away, that will take you to NYC. Convinient stores and restaurants are close by. The neighborhood seems to be safe, I didn't have any bad experience at all.
Jack is a very attentive person and it is very easy to contact him.
If I travel again to NYC, for sure I will stay there.