Edna is a great hostess with strong ethics and great communication. The apartment is clean and well cared-for. However, we didn't have a good stay in this apartment.
The listing says it fits 10, but we were 7 and it was much too small tight for us to be comfortable. The air conditioning in one of the rooms did not work well, and the people in that room really suffered with the heat at night. There was a ton of noise from nearby parties/clubs, making it very hard to sleep. And finally, the building is on a busy, noisy, not particularly charming street (unlike the rest of Leblon). A few of us actually left the apartment before the reservation was over because we were so uncomfortable. We stayed during Carnaval, so unfortunately we paid a high price for this negative experience.
Edna herself was very professional and did everything she could to help make us comfortable. This apartment is not bad if the price for your timeframe is lower, if you are clear that it is not large, if you confirm that the air conditioner is working well, and if you are staying at a time when there aren't likely to be big parties nearby causing noise.