We booked 4 rooms here for 8 people total (2 per room) and our room was lovely. Clean, comfortable, and with a great view of the Sumida River and Sky Tree. However, my other friends said their Double Room (1 bed) was realllyy small. They said there wasnt enough room to open up their luggage and such.
For us, it was a little bit more spacious but we managed to make it work by using the space under our beds. Other rooms did not have space under the beds. So im guessing every room is different... luckily ours was just right. What made it even more special was the fact that the staff was super friendly, patient, and helpful. They helped us move our luggage to another hotel at a fair price (roughly 2000~ yen for a big luggage bag) it made our travels much easier! Thank you for everything.