Elsa was very very helpful, replying in around an hour whenever I contacted her.
The place was very clean, not very spacious but not very small by any means.
The location was ideal with very good metro connection, you could get to any part of the city easily.
The only thing is that the neighbourhood was a bit noisy and a bit towards lower middle class, during my stay there was a renovation work in the next building which was really annoying (and that's a very temporal thing)
I had a very good stay at Elsa's and I would totally recommended it to other people, a very very good value for the money you pay