Solid. A great value. I stayed for a month and booked an additional one out of convenience. Room is very suitable for long stays; I don't think you'll find a better deal in the area.
Notes: on-site laundry is inaccessible without arranging it with the host. Otherwise, you'll have to use the nearby laundromat. The common area is the kitchen, which is shared with another tenant. You'll likely be spending most of your home-time in the room, which is spacious enough to accommodate. You have a personal AC and heating unit, a small closet, a comfortable bed w/ nightstand, some shelving, and a desk. Shower is newly renovated, I think. It's nice. Wi-fi is indeed included and works well. The area is technically not the safest in Jersey City, but I didn't run into any issues myself. I don't think I would recommend walking alone at night when you book, but that goes for most bustling cities and isn't exclusive to this location. I can't comment on public transport access as I didn't really use it that often—this review is being written during the height of the COVID19 pandemic, so I'm hunkered down. I also can't comment about car access if you're bringing one with you.
All in all, very happy I found this listing. Pleasantly surprised, and all's well.