We spent a few days in Madrid for a festival and loved it. The apartment is so well located with the Reina Sofia just round the corner and only a few minutes walk to the Retiro park, train station and metro station. There are lots of lovely bars and restaurants in the streets around the apartment so definitely worth exploring, and frequent buses or metros to other parts of the city.
Paloma couldn't have been more helpful, both in making arrangements in advance and meeting us when we arrived. She marked up a map for us with all the places we wanted to go and helped us plan transport to the festival. She also suggested some more local places that were worth visiting and was so friendly and helpful, checking in with us every couple of days to make sure everything was ok.
We loved Madrid and even the unseasonal rain and thunderstorms didn't spoil what will undoubtedly be the first of many visits to this beautiful city. We would definitely recommend both Madrid and Paloma's apartment, you won't be disappointed. Happy holidays!