Amazing location on a quiet street, steps away from the subway and easy walking distance to Union Square. The apartment is a full one bedroom, with a full sized kitchen, not a studio with boat size appliances. The bed is very comfortable, and the wifi/cable reception are fantastic. There's laundry in the basement, and who doesn't love an elevator when hauling luggage? Laurent is extremely responsive and flexible, a perfect host!
The apartment is in an old NY building so you can't control the heat, but the a/c works well. Laurent lives there, so his things are there, not leaving a lot of room for hanging clothes. I'm sure Laurent would work with you if this is important, given enough advanced notice.
All in all, a great place to stay!