As advertised, the apartment is in an amazing location, easy to reach from Union Square subway station. The apartment is small but has everything you need for a New York holiday. The only drawbacks are the shared bathroom and the overall age of the building, the stairs are very loud :). The walls are also thin given the age of the building, so if you are a light sleeper, I recommend bringing ear plugs.
The host answered all our concerns quickly and was very nice. Check-in and check-out were very easy.