We stayed here in October 2018 with our 8month old son and are happy to say that Samantha's apartment is a nice, contained, baby-friendly space.
With a good-sized kitchen to prepare meals and snacks ahead of our long days in the city, a lounge/dining area with space for our son to play, and a washer/dryer combo to keep his clothes clean; the apartment really helped take the stress out of the holiday.
Though the bathroom is shower only, we were able to use the spacious farmers sink as a bath for the baby.
As a host, Samantha was fantastic - researching airport pick up services with car seats for us (we used EZ Limo from Newark airport) and providing recommendations for local restaurants and transport links.
The property is located about 25 mins from the Path station (Journal Square) which has lift access to the platforms. The walk isn't far, but can feel a bit wearing after a long day in the city. However, if it hadn't been for the baby we would have taken an Uber which would have taken much less time.
All in all, we had a wonderful time and will hopefully be back in the not too distant future.