Overall, I had a good and comfortable stay at this property. The house and room itself is lovely - my bed was comfortable, had good air-conditioning for the summer months, the bathroom was clean and the shower has great water pressure! Having access to a kitchen is great too. Getting my keys was a smooth process, too.
There were two things that were issues.

1. (Which cannot be helped) The neighbourhood isn't the best area. I didn't feel unsafe, as such, but I also made sure I came home before dark as I didn't feel I would be comfortable otherwise. Bear in mind, however, that I am a single girl, so other travellers might feel totally fine.
There is a supermarket in walking distance, which was handy if you're trying to save money.

2. Don't book this property because you think you will get to Manhattan in 15 minutes. It definitely takes longer - even to Lower Manhattan, let alone midtown - particularly as the local buses are not very reliable (often showing up late). It is true, though, that using the number 4 bus to the Grove Street Station means that you can use public transport almost to the front door, which was great.
But it definitely takes a while - maybe more like 30-45 minutes.

Overall, I had a good stay - you just need to be aware of the limitations of staying Jersey City, rather than being in New York itself. The house was clean, modern and comfortable, and while I didn't meet Magda, the experience as a whole was a smooth one.