Really great apartment in an ideal location, close to the subway and local food markets/bars and restaurants.
As others mentioned, it can be a little noisy given that it's a basement (pipes knocking, boilers and traffic) but it's not constant and after a night or so we didn't even notice it.
Guillermo is a great host, provided loads of information and was great at communicating too. Will definitely look this place up again when we're next in NYC.