I had a thoroughly great stay at Alexandra's flat!
The location is great. In front of the subway stop. Hard to beat that. I was commuting to Manhattan every day, but it was not a problem at all.
The flat was extremely clean and quiet, much more quiet than I'd have expected from such a location. The wi-fi is excellent (much, much better than I'd find at a hotel) and I could easily get work done from there.
Moreover, Alexandra is a wonderful host and when I forgot some items upon leaving she warned me so early that I could come back and fetch them, saving myself a whole lot of hassle.
Thank you Alexandra!