Our stay was both good and bad. The location is fantastic, just a block away from 5th avenue with its wonderful collection of yummy restaurants and bars.
The apartment itself has lots of light and a nice view.
The heating right next to the bed and in the living room makes a lot of fan noise when it goes on. We had to sleep with ear plugs to dampen the noise somewhat. So if you come anytime other than summer, just know that the heating makes some fan noise.
What was frustrating in our stay was that the hot water was a total gamble. Sometimes there was none at all, sometimes we'd have 5 minutes of it and then the shower would suddenly turn cold, sometimes we had a somewhat warm shower, sometimes a really nice one. Coming in from the cold after long days of walking through wintery NY, it was frustrating, and for 5 days, the host just kept saying: "I'm in touch with the building management" without anything else happening. I imagine it will be fixed when you stay, and the host reimbursed us 20% of the value of our stay for the hot water issue, which we appreciated.