Dan's place was clean and well equipped (kitchen, bathroom, towels, sheet etc). Location was a bit away from Manhattan, but access to PATH was like 7 minutes by walking and neighborhood seemed to be quite easy going and neighbors were very friendly (at least 3 hellos on every walk to Journal Square station). Manhattan is really 20 minutes away and PATH runs 24 / 7.
Apartment was sufficient for 4 (two king beds) and beat out a small hotel room as there were nice small living room and kitchen. Air condition was big plus.
Dan and their family was very well available if needed but on the hand they gave us full privacy and we met only once. Check in was easy and there were lots of good advises from our host already before we arrived. Traffic in the area was very light and despite some festival one night there were hardly any noise during the nights.
I traveled with 9 yo son and Dan's place is just great for families as well. Definitely we will come back if we are travelling to NY or NJ again.