This hotel is convenient, if you have business in the area. And it is not too far from main attractions (and close to the metro) if you are a tourist--but it is not really "in" a traditional "hotspot" like Ginza, or near the Palace. The hotel itself is clean, with a very Western-friendly staff, all of whom speak good English. Rooms are average size and quality for business hotels in Tokyo (i.e., small and a bit worn). But the price was also reasonable (about $250 a night). This doesn't compare to the Four Seasons, Shangri-La, or Ritz Carlton. But it is half the price too.
Overall, I will stay here again when I have business nearby. One note--for about $100 more (10,000 yen) you can get access to the "club floor"--a very nice space on the 35th floor that features a buffet breakfast, light buffet appetizer dinner, and drinks. This may not be worth it unless there are multiple people in your room, you really need an open work/meeting space, or you plan to eat and drink an awful lot. The hotel is overall reasonable, but this was pricey.
Lastly, I would avoid the steakhouse in the hotel. Neither the food nor the service matched the price--there are plenty of better offerings nearby. The bakery/cafe off the lobby is quite nice, and the bar at the top of the hotel is acceptable--nice views, but not cheap!