Ekaterina's apartment is very spacious and beautifully decorated. We stayed as a group of four and could easily share the common spaces as well as have the privacy of two large bedrooms. Though located centrally in Travestere, it was very quiet in the apartment itself - you could easily sleep with the windows open during the night (and day if you're jetlagged).
Ekaterina was an attentive and responsive host, responding immediately when a few surprises happened on our trip (flight delay, jammed door, etc.) and always offering timely support.