The place (a flat in the basement of a nice house) is clean, comfortable and well equipped. Everything worked fine. It's located in a quiet street near a living neighborhood.
We stayed there for six nights and had a good time (and rest) after long walks in Manhattan (at least 3 subway stations within a less than 10 minute walk).
Cynthia and Jonathan are very plaisant hosts : they provided us a list of good places near their place. Special kudos for recommanding Lulu and Po, a small restaurant with good and original cuisine - we're French so beware this review :-). Thanks again for being so welcoming. We wish we could come back there.