Good hotel, great location. Room are extremely small. being 6.4 i was hitting my head on the roof in the shower. Also if your elderly, getting in and out of the shower would be pretty dangerous. Staff were ok, had a few miscommunications but may be down the language barriers. Plenty of restaurants and a 2 min walk to Shinagawa station.
Overall i would say it's ok. Nothing special, but clean and tidy with a good location.