The Hilton is a lower standard hotel. It is old and dirty. In the floors and in the rooms there is additionally a bad smell. At night it is very loud because it is directly situated at a very large street.
There is only one benefit: you can easily access New York using the train that starts at Penn Station.
But is you have another choice, don't go there.

I stayed at the Hilton, Newark, NJ right after Hurricane Sandy. However, I was fortunate enough to be there for a joyous occasion- a wedding. The accommodations were nice, but nothing special. I didn't get the door held for me (one of my favorite hotel perks that make me feel special). I was also utterly surprised (especially after the storm) that the Hilton charged for internet service in their rooms. I thought that they would have waived that fee, knowing how many people were displaced due to the storm. You also HAD to pay the $22/day parking rate. When I got to my hotel, there were some amenities missing in the bathroom and I had to find a maid in the hall to stock up. I just think there were some little touches that were lacking- the hotel did not go out of their way for me. I mean, it's the Hilton, I was expecting perfection. Doubtful that I will stay there again.

I've stayed at many hotels so I know what to expect. First off the price is way too much for what you get. We were charged 160 + tax for one night. For that price I expect a pool and hot tub and access to a nice neighborhood with a lot of nice places to eat. I also expect an internet or wifi connection to be included with the price. We had none of this. There was a tunnel with nice stores and some places to eat, but on a mid Saturday afternoon everything was closed except the hotel's bar and Subway. We ended up eating at a nearby Dinasaur BBQ which was ok, but it was really the only other choice we found (except for fast food at the train station).
The hotel wanted an additional 12.95 per night for wifi service. Someone is making a lot of profit on that (AT&T or the hotel).
Taxes on the room was a crazy 20 dollars thanks to NJ and Federal taxes. Could have stayed in downtown NYC for not much more and had all the amenities including excellent location.
Someone left a pair of socks by the hair dryer in the bathroom. View was terrible. Curtains wouldn't close to keep the early morning light out. There was a vent, but no working fan in the bathroom. Remote control had visible scum on it between the buttons. Beds were nice and comfortable and TV was nice. Heard police sirens twice. Not sure how common that is.

We arrived from a cruise ship two days after Hurricane Sandy went through. Thank goodness we had reservations here, staying for 3 nights. Great value, economical, and right across the street from Newark Penn train station. We took the train into NY city each day for only $5. Bell hops were great, storing our luggage securely until it was time to check in. Desk staff were always courteous and helpful. We used the lobby computer to print our boarding passes, free of charge. The only hiccup was at the hotel cafe, where they dropped our entire breakfast on the floor and took another 20 minutes to cook it again, rather than offering us the buffet instead. In the evening however, the appetizers and cocktails were a great way to end the day, and the evening wait staff was super. Street noise was at a minimum, with well insulated rooms even though we faced the street. We will definitely stay here again.