This is a great option for those who want to stay in a great downtown location and don't need a lot of space. Per the description, it IS the classic cozy NY walk-up apartment; if you need an elevator, a lot of floor space to do yoga, spread out all your stuff, etc. you should look elsewhere. For everyone else, it's great: the small roof deck gives a great view of downtown (and come to think of it, you could do your yoga there); and you're walking distance to tons of great restaurants, different neighborhoods, subway stations, etc.
Joe is a laid-back and welcoming host. He was prompt and clear when we were coordinating my arrival, thoughtfully explained the place and how everything worked, and basically made me feel comfortable.