Westfield Shoppingtown is one of the best malls that I have ever been to. It is located in Paramus off of Route 4 and 17.
It is a huge mall, big enough that people actually come there on winter mornings to run inside because it is too cold outside.
Every major store that you can think of, ranging from department stores like Nordstrom, Macy's, and JC Penny to clothing stores like Banana Republic, Gap, Express, and Abercrombie is there.
The mall is very nicely laid out and is also well maintained. It gets really busy on Saturdays, especially since it is located in Bergen County which has blue laws restricting store openings on Sundays.
There is also a nice food court with tons of options from Taco Bell to sushi. You can pretty much find almost anything that you are looking for at the mall.