My husband and I booked the Superior King Room for the two of us, and we thought it was great. There were a couple of small issues that, if fixed, would make it a five-star for me. I would definitely book it again.
First impressions: The room was clean and HUGE, equivalent to a small studio apartment. I could fully open my large suitcase on the floor and still have plenty of room to walk around it. I can see it being great for small families or groups.
Pros:
The service was impeccable. Staff responded to questions quickly. When I had an issue with our door, they fixed it immediately. They also helped with receiving a delivery and scheduling a cab when we needed it.
It's only about a 10-minute walk to Akihabara Station. A small grocery store is just down the block, perfect for buying food to cook or eat (you can save on meals!).
It felt safe. Access to the rooms was via an elevator that required a code, and the front doors would look around midnight (also accessible via a code), so not just anyone could walk in.
Cons:
The pillows (oof). There was one small, flat pillow per bed. We had to use the couch cushions to add some support. Even adding an extra pillow would help immensely.
There were no instructions for the washing machine. We purposely booked a place with a machine so we could do laundry. I'm not so arrogant as to ask for full instructions in English, but even a small diagram explaining the buttons would have helped.