We have never meet with Natalia, we contacted with her friend Daniel. He takes care about us. But anybody didn't welcome us, we took the key from his friend. Flat's location was central, just five min to plaza mayor by walk. Street was so noisy, as usual Madrid center. We think it was arabic street. There is no lift in the apartment, even it was writing on page!! In flat our sheets were clean but so old. It made us uncomfortable. Generally wifi connection was slow.