Susana's place was located in a very convenient location, about a 5 minute walk from Plaza de España. The apartment was a perfect size for the two of us, and was on the top floor of the apartment building, giving us access to the beautiful terrace upstairs. If you have difficulty climbing stairs (or cannot carry your luggage), I would not recommend this place to you.
My fiancé and I stayed at this apartment for two days and felt safe, comfortable and relaxed in this apartment. There is an air conditioning unit if you get hot and we were provided with a large water jug as well for drinking water. If you were to stay longer than a few days and wanted to cook, there is a nice kitchen, large fridge, and some kitchen amenities. Overall, we had a great time staying at Susana's.