We had a restful and enjoyable time at Balta's place. It is practical and homely with all you'd need. Balta's mother greeted us, and Balta has been prompt with all our correspondence.
The apartment is well kept and clean. It is located in a safe part of Madrid, and the apartment itself has high security. The metro & buses are only 5 minutes walk away and these take you to most places of interest in 10-15 minutes minutes.