We spent a week in New York at Alex's apartment and couldn't have asked for a better place. Excellent location in the UES, close to 2 different metro lines and only a 10min walk to Central park!
The apartment itself was very clean and looks just like the pictures. Other "nice to haves" for convenience include a laundry room on the floor at very reasonable rates as well as a T-Mobile just downstairs for overseas travellers needing a US sim card. There's also a guy in a food truck 1 block away who sells really decent bagels and coffee for $3 all in, which in New York is practically a steal...
Alex was a fantastic host, he's very easy going and was always available to help us with any questions we had. He would also check in from time to time just to make sure we were okay.
Would definitely stay here again and highly recommend it to anyone planning to visit NYC.