Jessica's apartment was totally as in the ad and others have described - a really nice place to base ones self for two weeks while working and exploring New York. The flat had everything I needed for a comfortable stay. I like to cook so appreciated the neat little kitchen. I loved all the plants in the front window, and being able to go out on the roof - although this time it was too cold to stay out for any length of time, or I may have never left that rooftop! Perfectly private in a decent neighbourhood. I even made friends with the guy from the Indian takeaway over the road :) . Plenty of restaurants/takeaways/bars to explore. It was within easy reach (5-10 min) of several subway stations and lots to look at along the way. And like others have mentioned felt safe walking back in the evenings.
Jessica was extremely accommodating when it came to my unexpected delay (luggage got left at Heathrow!) and didn't seem to bat and eyelid about the inconvenience. She was there when I got there to welcome me in and again when I left and even helped me down with my bags - what a sweetheart .
She even messaged me to ask if my luggage had turned up.

The only tiny problem was the noisy radiators which come on automatically - nothing you can do about that . and Jessica did warn me of this. You can adjust the individual radiators but problem is if left on it's just way too hot, and if you turn them off, they spout water - maybe a bleed is in order, but they are old , so it kinda comes with the territory. I just kept the windows open when they were on.
Could have done with a scourer in the bathroom to clean the bath/basin , (as I was there for two weeks).

But I'd definitely stay there again next time in warmer weather ;)
Would recommend to others - as long as you don't mind the 3 flights of stairs (or is it 4?!) , for me its great being on the top floor .

Thank you Jessica!