Vanessas and Montses place is okay. The location is very convenient - it's not the center, but the metro is 2min away, so you reach the city center in 10min. Communication was easy too, even though we were hosted by a lady who doesn't speak English, we texted with Vanessas husband about everything and he was really helpful and quick to answer. The AC is very useful both during the summer and the colder season to control the temperature of the apartment. The downside of this place is the kitchen - it's very small and not really practical for making food at home. In addition, the bed could be a bit small for bigger folks (140cmx190cm). So, if you're not into cooking yourself and don't mind the smaller bed, the place will be great for your visit to Madrid!