Excellent spot! Ángeles' apartment is clean, well-equipped, and very centrally located--less than 10 minutes walking distance to the cathedral, etc. Everything was as explained on her page.
I stayed for two weeks while I was doing research at the Archivo General de Indias, and this would be a great place for other people doing research and is comfortable for longer stays. Would also be lovely for a quick trip!
Ángeles was always quick to respond to any questions I had.
Highly recommended!