The location of Mary Lyn's apartment is perfect (2min behind the huge Zara and Primark on Gran Via) and the apartment is really clean and cute. Since the room is street-facing it does get noisy in the evenings, but that's what you get for staying at the very central of the city. Mary Lyn and her mother are nice and kind, and the communication is very smooth. One thing I do wish to note is this seem to be a hostel (with 4 individual rooms and 1.5 bathrooms) and you will be asked to provide some personal identification information, which I did not expect. But other than that, Mary Lyn's apartment is a great value and I'd recommend it if you don't mind the hostel aspect of it.