Sonia offers a very modern and restful apartment on the outskirts of Madrid, but there’s a Metro and Cercanías train that share a station about a 13 minute walk from the apartment, or if you have heavy luggage like me, a short 4 minute taxi ride to the station. The Cercanías train gets you to Chamartin train station in 23 minutes and even less time to the airport or Madrid PA train station.
There’s a very nice pool at the facility, but it wasn’t open for the season yet during my stay, so,if that’s important for you, you might want to check on when pool season starts and ends. Otherwise, I enjoyed my stay very much and was able to do laundry, which was nice.