We spent four nights here. Bedroom were tight but like any other Japan rooms. I would actually say it had a bit more space than the average Japanese room we stayed in.
It has a great common area with burners, electric kettle and various kitchen items for you to prepare something quick. Also comfortable sofas and a dining table. Staff was friendly. I would not consider this is an apartment, but a private room with a private bathroom though. There is no room service but they will change the towels upon request every two days.
We stayed through the typhoon and despite that we had a pleasant, comfortable stay here. Thank you so much!