We had a nice stay at Natalia y Robertos. We met Arnie during check in and got situated right away. The place is really central, you just need to walk uphill to get to main attractions around the city. The food in this neighborhood was delicious. We were glad to have air conditioning during the 102 degree summer weather, and the reminder from Arnie to empty the bottles so it wouldn't leak :)!. We took a train and a metro to get to the apartment from the airport. All in all, clean, cute, and comfortable- a nice stay for a few days in Madrid!