We stayed at Faina's for five nights, in the middle of June 2013 and it was a great experience, so far the best accommodation I had in numerous times I have visited Paris (including Hotels).
The apartment is cosy, functional and very bright, on the third floor. There is a lift, quite small, but fine for two people, or one person with a big luggage.
We were met by Judith, Faina's friend, who showed us the flat and provided us with all the information we might need.
The rooms were clean and there is a good storage space made by shelves for clothes, shoes etc, as well as a welcome booklet written by Faina with detailed information about the apartment, including house rules, metro and bus stops, restaurants etc.
The sofa bed, for two people, is very comfortable, and the duvets (it is not a double duvet, but two single duvets) very warm.
Should you be sensitive to light coming in the room in the morning, I suggest you to bring with you an eye mask for sleeping, just in case, because even if there are curtains the daylight comes in. Not a problem for me, but maybe someone could be bothered about it.
I enjoyed very much the neighbourhood, it was the first time for me in that area and I found it more Parisian and less touristic compared to others I knew. I particularly loved this! There is a huge Monoprix really close to the building, several small shops and nice places where to eat. The only thing I was a bit uncomfortable about it, it was the fact that every evening, until quite late, there was the same group of people, around 20 years old, chatting and screaming quite aloud right in front of the building (but they were not sitting at a café or so, just being there in a group standing and being very aloud for hours), but this is not Faina's fault of course, and I surely would stay again in her apartment in the future!
As for the communication with Faina, she was really quick in answering and very kind, definitely go for it!