I stayed at Rosario's place for a month and my experience was very pleasant. I had a lot of privacy, the room is comfortable, quiet, well equipped and has a beautiful view of the park nearby. Rosario made sure I had everything I needed for my stay and was always willing to help.
The house is near Stockwell tube (Victoria and Northern line) and is quite easy to get to the center of London. I felt super safe and, in addition, there are supermarkets, cafes and pharmacies close to the house. I absolutely recommend Rosario and her hospitality in London!