Booked this place as a participant for the Tokyo marathon but also wanted to be able to have access to the railways in order to do some sightseeing. Shinjuku station is just 0.4 miles away. Arrival and check-in was easy. Midori offers a set of instructions for your stay and they are dead on target. The description of the place is accurate and while there is a restaurant below (great food by the way), you will not be disturbed at all. The place is very modest by American standards, but it is more than comfortable for two people who are going to be out and about. There is also a sofa bed/futon but add one or two more people and you will be a bit cramped. The bed was very comfortable, the heating system effective and the toilet area is a unique experience (not what I focus on, just trust me on it). She has a kitchenette, food storage, utensils, microwave, dishes, glasses, and a more than adequate shower and bathtub. A washing machine and Japanese dryer are also quite helpful. She provides instructions for everything and its pretty easy to understand.
The pocket wifi is perfect for staying connected and clutch. Remember to bring it with you but don’t lose it. The charger for the pocket wifi is provided. The outlets are all standard for American electronics but you should bring an adapter just in case. There are many restaurants, grocery stores, and just about anything you want just a short walk from this place. Would stay here again in a heartbeat. Did not go to the rooftop so can’t speak on that.