I stayed for a month, because I work remotely. Everything has already been said in other reviews. Not your ideal place if you're used to living on the countryside, because the street is quite busy, even at night time.
Perfect for 1-2 guests. The bed is very comfortable.
Rebeca is a good host. She greeted me personally and showed me the appartment. If I needed anything, she was quick to respond.
The appartment is at walking distance from the main tourist attractions (about 20 minutes or so on foot), or you could take the metro (entrance at 100m from appartment).