We thoroughly enjoyed Fernando's apartment in Madrid. It was centrally locally close to restaurants, shopping and transportation. We found it very comfortable for our family of four which included two teenagers. The apartment had everything we needed and was a great place to relax at the end of a long day of sightseeing.
Two things to be aware of:
1. Be prepared for the 5 flights of stairs. It's only a challenge when bringing your luggage in but after that it's just some good exercise .
2. The apartment is located in a busy nighttime area. People are going until the wee hours of the morning which creates a lot of street noise.
Overall, we would definitely recommend this apartment.