This is a perfect apartment for a long term stay. Quiet, comfortable in all aspects, very well equipped and ideally located in the heart of the great city of Madrid.
Everything in the apartment worked flawlessly for my whole two month stay. The shower is really good, stove nice and hot, multiple TV channels on a smart TV and the internet connection is immaculate (easily 100mb/s at all times). The apartment is beautifully decorated and ornate. It was also spotlessly clean when I arrived.
Alicia was a great host, warmly welcoming me to the apartment and also providing me with an extremely comprehensive list of things to do and places to go.
The apartment's location close to Atocha station is another huge plus. It's not so close that you can hear the trains but close enough that a very short walk can give you access to trains departing for every part of Spain.