In general, the apartment and the location were nice. Tho we had some negative experience as well.
1. Rafa's friend who let us in, he was late. When he arrived he was in a rush, so it was not really a nice welcoming.
2. The toilet seat in the shared bathroom was broken, and they didn't fix it while we were there, even if I requested it on the day we arrived. They promised to do it, but it never happened. (The handyman arrived only on the day when we were leaving exactly at the check out time.)
3. One of the bedroom's window is facing an inside small patio, so the neighbors can see you. (Tho that's usual in the downtown apartments in Madrid!)