The stay is exactly as shown on the pictures. You get 2 beds, 2 towels and a hair dryer, other than that you share gender specified toilets and 1 shower. In our stay we had no problems with neither the toilets or the shower.
The owner Smile Home were quick to reply and sent me/us very informative and good information about the surrounding areas and Tokyo in general.
Location of the bnb was superb, 5 minutes from the nearest train and 7-eleven and 20 minutes away from Tokyo Dome.
A little negative is when its raining the windows in the room tends to fog up and moist the bed siding, else its right next to a highway so sleeping with the window open is a no go! But with the aircondition you won't experience cooling issues!
5/5 would stay here again!