Twin room on Club Floor on 15F delighted with comfortable beds, convenient outlets, an easy-to-use thermostat (we find Japanese hotel rooms overheated so just like to turn off the heat) and an outdoor balcony that gave us fresh air and a high, quiet city view. Lobby is beautifully appointed, there is a Lawsons adjoining, and a 7-11 that was ~3 blocks away when I needed a 5am jet lag snack. Shinagawa Station was down the hill ~ 6 blocks away. Staff were helpful and attentive.
Use of the spa until 10:30pm walking through the beautiful garden was the real bonus. It was too cold (March) for the outdoor pool to be in use but I could see that being a big plus.