We spent a week staying in Adrienne's lovely apartment. The location is great, only a few blocks from an express Subway station and a similar distance from a local Subway station. There are several nice delis just around the corner and a cosy-looking cafe and bar (though we didn't visit it). A few blocks away there are several shops, including a supermarket and a bank, and the Key Cafe isn't far at all. It is convenient to reach from any of the airports serving NYC.
The apartment itself is lovely - very spacious and comfortable, and the bed is excellent. In fact, maybe too comfortable - so difficult to get up in the morning.
Adrienne is a great host; as it happens, we didn't actually see her during our stay, but she had left a Welcoming Letter with various useful information, such as the WiFi codes, travel information, etc. She was in contact with us before and throughout our stay to make sure everything was going well. One day there was a problem with the shower, but without us even having to report it, Adrienne made sure it was fixed immediately, and generally she made us feel very welcome indeed.
If you are lucky enough to find her apartment available, book it! You won't regret it. The fact that it's on the Upper West Side isn't a problem at all. Jump on the Subway and you can be anywhere in NYC in a very short space of time. We would certainly stay again!