Sylwia was a nice host. I didn't meet her personnaly during our 3 days stay because she was at work. The room is very nice except the boiler (nearby the room) which releases too much heat to the room. Not a big deal.
The path train is just 10min walk from Sylwia's house. Manhattan is just around 10 to 20 min depending on where you go to. If you land at Newark airport, the shuttle to reach Jersey City is currently out of service, so you will need to use the bus to Grove station.