Alex's apartment is super convenient. It's perfectly located for all local amenities in NJ City. Very close to Path Station (not part of the Subway for those who've not visited the area before, so make sure you've got enough loaded on your Metrocard), which takes you straight into Manhattan. Some really lovely restaurants down Grove Street and Christopher Columbus Drive (the pedestrianised area), so do try and explore the area too. There are also the usual suspects like McDonalds, Starbucks, Krispy Kreme within close proximity of the place.
The apartment technically sleeps four, but the apartment is setup where you walk through the bedroom from the lounge to get to the kitchen and bathroom so privacy could be an issue if it's required between friends or couples sharing together. It wasn't a problem for us as two friends. Heating is really efficient for colder days and nights. We visited when it was quite cold and didn't find any problems with the apartment keeping warm.
Good value for money!