We stayed at the Hilton, Tokyo over Christmas and New Years 2012-2013.
As we were travelling with 2 young children, location was very important for us.
The Hilton Tokyo is connected to the subway station Nishi Shinyuku, making it very conveninent to get on / off tge subway and go to wherever you need to go!
The hotel also has a great shuttke bus every half hour that took guests to Shinyuku Station ( FREE)
The hotel has good size rooms, great new decor and very comfortable beds!
Don't forget to get the breakfast buffet! It is excellent! Many choices both western and Oriental, enough to please even picky western kids ( like mine. : P )
Great hotel overall!