FS Marunouchi
I have stayed in a 1-bed suite here and a Premier room and I prefer the Premier rooms, especially if you get one on a high floor, overlooking the plaza, which at night has fibre-optic lights set into the ground, which create different light shows - great to watch.
The 1-bed suites have excellent corner bathrooms with egg-shaped baths, but strangely they do not feel as spacious as the Premier rooms, which are very large, well designed and more like junior suites.
Booking limos from the airport to FS Marunouchi is probably the most expensive thing you can do in Tokyo. Most people catch the train, but as this can be confusing and tiring for a first-timer, you can also book a meet and greet service which will lead you to the right train and right carriage. once on board, announcements are in English, so it is impossible to miss your stop.
We once paid around $500 for a one-way transfer from Narita, so be careful!