This is a comfortable apartment in a fabulous location, with coffee shops, restaurants, and lively streets. It was perfect for my 9 day stay, where I connected with old friends and felt like a real New Yorker. The apartment itself was quite quiet and I felt really safe there. Although it had little natural light, the whole apartment was well-lit with ceiling lights (unlike many dingy hotel rooms). Mathilde was out of town during my stay, but the arrangement for the key pick-up was simple and well organized. She had also left detailed notes about the apartment. Mathilde sent me emails to check that all was well. She also let me leave my luggage in the apartment on the afternoon of my departure.
My only disappointment was that my AT&T iPhone did not receive a signal in the apartment. Since I had asked people to call me there, I had to find some alternate plan. (The wifi worked well, and I could use Skype to make calls.) In her notes, Mathilde indicated that I was free to use the home phone for local calls, but did not leave the number. It took me a little while to find the phone and then to figure out how to get the number. I did this, and all was well, but it would have been useful to know about this ahead of time.
All things considered, Mathilde was so well organized that I had no worries about the arrangements and could enjoy my stay. As an added bonus, Mathilde left some nice condiments in the fridge!