Masa was a great host! She's very responsible and had lots of thoughtful touches (extra toothbrushes and some slippers, for example). The place was exactly as described. It was also fairly close to Broadway and to Grand Central Station. Like other reviewers said, it's in the city so there's a fair amount of street noise. We had a white noise machine and that worked pretty well to drown it out.
Our only complaint was the internet -- it was internet available through a local business and wasn't a very strong signal. We found we had better luck with the NYC Public Wifi.