The Courtyard at Columbia is a fantastic place to stay. I lived in NYC for 10yrs (back visiting) and out of all the places I ever lived (7 different ones!) this was by far the quietest. It's an oasis with a beautiful private courtyard, which my girlfriend used frequently for naps. Getting in and out of the property is really easy as Tom has it set up to not have to carry a bunch of keys around, which is great. It was very clean and comfortable. The location is really quite perfect - don't be thrown off by "Harlem"... even 8yrs ago when I was living in NYC, Harlem was already starting a revitalization. There are plenty of easily walkable boutique restaurants and coffee shops. If you're a runner, you're in luck. The Courtyard is perfectly situated between Morningside Park (Columbia College), Riverside (Hudson River Park), and Central Park. Lastly, the it's so convenient for express trains downtown and easy/short enough to cab/Uber to the east side for museums, etc.
Tom is very responsive and even checked in a few times on the app to make sure we were enjoying ourselves. I couldn't recommend this place more.