We met and communicated only with Celma's husband Gert as we could speak German with him. Communication was excellent. Instructions on how to get to the apartment was perfect and also pro-active from Gert's side. The apartment is small and cosy, recently renovated and all is fresh and new, well-equipped and super modern with all facilities you need. Location is perfect as it is walkable distance to the main sights of Madrid and within the bustling trendiest neighborhoods of the city (Universidad/Chueca). Might be a bit loud due to traffic noise as it is situated on a main road but at night it's definitely more quite. All in all I would highly recommend this apartment.