Located in the New York's Upper West Side it is nestled firmly between Central park and Columbus Avenue; two blocks to the nearest C Train makes for a comfortable connection to every major landmark and travel hub. The street is surprisingly quiet for NY.
I did not have a lot of problems during my stay and did not meet Kirsten in person, but on both problems (locating the lock box for the keys and broken WiFi) she responded quickly and nicely. She was also really friendly and helpful in our conversations preceding my stay.
The apartment itself looks exactly like in the pictures and was in good condition when I arrived. Everything you need for comfortable living is available, with the exception of a flatiron. Check-in is made easy with a lock box containing the keys.
The cats are loving and comparatively easy going. They can be a bit too loving if you are not used to cats cuddling a lot as they almost constantly circle you looking for a head scratch. Kirsten recommended locking them in the bathroom and that is probably the easiest solution for all parties involved. Over time they become calmer as they get used to the stranger living with them. The only downside to living with Audrey and Lucy can be that they want to get out of the bathroom in the morning, so keep that in mind when you like to sleep longer. And on a side note: Living with cats means cat hair.
To sum up: Lovely location and apartment, nice host, sweet cats. I can recommend staying in Kirsten's apartment to everyone but people suffering from cat hair allergies.