This hotel is perfect for the short stay and is very convenient to the Yurakucho and Hibiya line.
Beyond that, however, as a business traveler, it would be difficult for me to recommend this hotel as it did not have nowhere near the required space to hang up my 2 suits and accompanying shirts and ties that fit within a carry on. Even by Japanese hotel standards, this is by far the smallest I've ever been in. My carry on barely fit through the narrow doorway. Hanging up my suit and shirts, meant that my carry on suitcase would either block the door, or block my shower/bathroom door.
I even asked and paid more for a double thinking that it would give me a little bit more room but was very disappointed.
This hotel really is for the 1-2 night stay for the local Japanese business men, not for the international traveler that may stay a bit longer.
For the record, I was in the Ginza MAIN, not the ANNEX. So for those of you who do use the taxi from TCAT or Tokyo Station, the taxi driver will need to know the difference between the 2, and their GPS will need to show both. Otherwise, your cab fare will go up as your driver will drive around the 1 way streets to get to the other side of the main street that separate the 2 buildings of this hotel. Even my client (a Tokyo native) had a difficult time with his GPS.
Finally, if you do use this hotel, be prepared to carry the massive keychain that accompanies the key to your room. It's a solid piece of plastic that's at least 8-10" long and took up way more space in my briefcase than I would have liked.