The pros: The house itself is beautiful, close to the station, quiet, and (for Tokyo) pretty secluded. It's in a very stylish area of Tokyo to live and if you're okay with walking a bit, it's not too far from karaoke bars. We only stayed one night, but I really liked the location.
The cons: The ceilings were a bit low. (I'm 5'7 and almost hit my head a couple times.) Like other reviewers said, the walls are very thin. It's easy to hear the neighbors. We went when it was super hot and the air conditioning wasn't on when we came in, so it was a bit of a sauna before we figured it out and aired the place out.
It wasn't exactly what we were expecting when we came in, but after settling in, we didn't want to leave.