Small, narrow room but good for value. If you are spending most of your time outside and just come back to sleep it shouldn't matter much. The room itself was clean and organized. Easy access to Skytree nearby and not a far walk from the subway station, so it was fairly convenient. The room internet wifi works simply with no issues.
The only downside is that the check-in tablet I happened to use crashed a few times during check-in, although I was able to look up my reservation details again on another tablet including the room access code. When I attempted check-in the first time there also wasn't any (English-speaking) available operator to answer the call. I tried again immediately after and I got connected to someone though so it wasn't a big deal in the end.