Maria's apartment is very well located and perfect for 4 people. It's not huge - but perfect for 4 people to sleep, recharge & use as a base whilst visiting Madrid. We stayed for 5 nights and there really wasn't anything I could say could be improved. There are a couple of balconies off the front rooms which were really lovely. It is 1 minute walk from the Metro station, 30-40 mins by Metro to the Airport (easy journey), supermarket 1 minute away and lots of cafe's/restaurant's nearby if you can't/don't want to cook! Would definitely recommend for anyone looking to stay central to Madrid.