I arrived to NYC for a 2 days conference in Columbia. My schedule was really tight and I needed a place to crash at night.
Greg's place was great for that. It is ideal as a night base for NYC explorations and/or for visiting Columbia which is just a short walk away.

The space is clean and comfortable and Greg was very nice and accommodating. I asked in advance if I could arrive late night and leave in the late evening and this was no problem.

One thing to remember, though - there is no kitchenette available. This is not a real problem as there are many cafes in the neighborhood, but one should be aware of this before hand.