Great NY hotel surrounded by all the action, but pricey and gouging
I've stayed at the Marriott Marquis several times and have been pleased during each stay. The hotel is massive but staff try to be personable and everyone is friendly. The rooms are very clean and many offer great views of Times Square. They are in the midst of renovations and have recently changed around the restaurant situation (American style restaurant opened, sushi gone). The Marquis is a quiet getaway from the craziness of Times Square. You pay a premium to be in this area but have the ability to walk out of the hotel and be surrounded by people, stores, transit, and services. The hotel could make more money if they stopped gouging for everything (in-room internet, business lounge, room service, etc are all extremely overpriced). 
If you do want high speed internet in your room, subscribe for a month with Boingo.com. The cost of the subscription will be about $10 for 30 days, and you can use Boingo login info with the Marriott's wired & wireless systems.