The two most important points up first: This cosy place is sweaky clean and its location is priceless!
You don't need a rental car to get around unless you enjoy $50/day parking in Manhattan after you got ransacked by fees and tolls even getting into town. In less than 20 minutes you'll be at the WTC (5 min walk to light rail and a 7 min ride you'll join PATH for a 10 min run, viola).
The apartment is perfect for a couple spending a few days exploring NYC or even Jersey.
You also have some fabulous restaurant in walking distance.
The OAK on Pine (BYOB, seriously!), Harry's Daughter (Caribbean, delicious) or have some ol' fashioned breakfast at Nick's (Greek couple running a venue stuck in a time-wrap 1976 with walnut wall-paneling).
Well - Did I mention we had a fabulous time??
This is a fun place - on so many levels.