Had a great stay here!
The location was very quiet at night (good for sleeping), and was close to multiple train stations, which made it easy to get around. The neighborhood was OK - we mainly did our sightseeing and eating in other neighborhoods.
The room itself was small and compact, but had everything we needed. We each had a backpack and a small suitcase, and the space was manageable. The room had a comfortable bed and a small desk, but not enough room for two people to sit and hang out. So we spent most of our day outside of the room, and came back only when it was time to sleep. The bathroom was small but very clean and functional - I think it was typical compared to other bathrooms we saw in Japan.
The common area had a place to hang out/eat, a small kitchen, and laundry machines.
One thing worth mentioning is that I wasn't able to find a three-prong electrical outlet in the room, and so I couldn't charge my computer while staying there (I didn't really need to though, so it wasn't an issue for me, but might be for someone else). There might have been a three-prong outlet in the common area, but I didn't check.
The check-in and check-out process was very easy. The building door and the room doors are unlocked with security codes, so no keys are needed. It was easy to find the building by searching on Google maps.