We stayed at Sylwia's place for five nights. Making the reservation was easy and her sister met us at the door even though we got in a bit late (9pm or so). The walk isn't too far from the PATH train (10-15 minutes depending on how speedy you are) so if you're ok with spending a little extra time getting into NYC, it's a nice location. Jersey City itself is quite nice as well; the neighborhood is filled with cozy places to eat including a pancake place we loved. The room itself is nice and having your own private bathroom was great. Sylwia provided towels and sheets. The room is on the first floor on the street but it was pretty quiet (except for one other kind of noisy guest, I think also using Airbnb) and we slept extremely well. The only two negatives were that the room was quite warm (house thermostat was set to 74 degrees F) and that we couldn't get any wifi. But all in all it was a good stay, especially for the price and proximity to New York.