Esther is a very responsive host who dealt with all our queries promptly and efficiently. We had a late night arrival and it was helpful to be able to pick up our keys at the airport before heading into town. The apartment itself is modern, spacious and bright. It would work especially well for larger groups being very spacious and well designed. It's centrally located to all the major sights, making it very easy to pop in and out during the day - a welcome relief on a really hot weekend in Madrid!