The new Otani Hotel is a great hotel to stay. It is about 300 meters from Nagatacho Station and easy to find.
Check in was quick, courteous and efficient, rooms were clean, fresh, pleasant.
The hotel is fairly big, has a pool, various shops and restaurants.
I must say that it is an expensive hotel, but great. I can certainly recommend it if you are not on a budget.
What I can't recommend however is the Bella Vista Restaurant in the Hotel. The service is 'OK' (but OK in Tokyo is still very good compared to other places) but the quality of the food I found disappointing to say the least. It is an expensive restaurant and I expected better service and nbetter tasting food.
Don get me wrong, both the service and the food were not horrible, but definitely subpar for Tokyo and subpar for that price. Venture out of the hotel to eat, there is better to find