I spent three months in Janet's apartment. It is located on the fifth floor (US floor count) in a walkup. The building is well kept, the neighbors seemed nice and friendly.
The apartment itself is a single room, ideally suited for one person or two people who know each other really well. It's bright with two south facing windows. Thanks to the window guard you can keep the window open without fear of anyone climbing in. I found this really nice as I love to have a window open.
Shower and sink had instant hot water, no need to wait, which is not a given in New York. The bed was comfortable and as someone who had back trouble before, I can say that it has a good mattress that didn't give me any problems.
The apartment is on a tree lined street, so relatively quiet. Friday and Saturday evening you could hear people celebrating outside, but during the night it was usually very quiet.
In very close proximity you can find coffee shops, a pharmacy, a supermarket and lots of restaurants. Within 10-15 minutes you can either walk to Washington Square Park or Hudson River Park if you want to wind down, do people watching or exercise.
Good connection to public transport. Christopher Street subway stop is within 1 minute of the front door, further subway lines are within a few minutes walk.
Janet was a great host. She helped me with my luggage, responded quickly if I had questions and occasionally checked in via the app to ask whether I needed something.
Cleanliness could have been a bit better (dust under the sofa, etc), but nothing major or really annoying.
I would go back in a heartbeat, can't recommend Janet's place enough.