We had a great time in Jersey City! Sammy was a great host and was always responsive, he was also kind enough to let us leave our luggage in the apartment on our last day as our flight was in the evening.
The area itself is quiet and peaceful, and felt very safe to walk around. The apartment was warm and inviting with all you would need provided (e.g. cooking utensils).
If we ever visit NJ again we would definitely look for this apartment.