Convenient location, not much else...
Why stay at this Hilton? Convenience pretty much, if you need to be downtown. The rooms are clean, decent size, but nothing fancy. Furniture is pretty much Ikea-like. There is a gym with basic equipment, and an indoor pool.
Nothing that gets the heart racing, and unless there's price convenience or you are part of the Hilton loyalty program, probably one of the many boutique hotels in NY will make your stay a more memorable one.
Major plus (for some)- Century 21 is right next door, so you can shop to your heart's content just before close to beat the crowds.
Note: construction at the next door WTC has been going on for years, and it looks nowhere near completed. A bit of an eye sore, and I always seem to get that view!