Stayed here for 5 nights while being a tourist in Tokyo.
Very well located in Akasaka, really one minute from the Metro and walking distance from Roppongi (good if you're out partying till late when the Metro is closed) and from lots of tourist attractions. The hotel seems popular with Japanese businessmen and foreigners as well.
I stayed in a single and yes the room is on the small side, but the space is well organized and very functional, so it really felt comfortable.
I arrived late at night, and was given a room that to me smelled like smoke. The night receptionist did not agree with that it smelled smoke, but I was given another room nevertheless. Great service!
Breakfast was not included in the low rate i was paying, but you can buy it as an extra from the hotel or you could just have it at one of the many places around.