My partner and I stayed at Jackie's air bnb for 3 nights, and we had a great stay! There are two rooms in the apartment, both of which have black out curtains and locks on the door so it feels safe even if you don't know the person staying in the other room, since you can lock your door and keep your things safe when you're out of the apartment.
I would say it isn't the best if you want a lot of privacy as there are folks coming in and out as their reservations are booked for their stays in the other room, and in between the stays there are cleaning person(s) who clean the restroom, kitchen, and also the guest who left's room.
You do share the bathroom with the other guest in the other room, but honestly if you're doing your trip well, you may never cross paths with the other guest as my partner came to find as we truly only stayed in the room to rest and to take showers in between all the amazing things we did in and out of the neighborhood (lower east side). You're right next to a pretty great market called Essex Market, and close to lots of train lines making it super convenient to get up to 1-5 ave, or even on the other side of the bridge to Brooklyn.