This is a very large, extremely well located and clean apartment.
With two good sized double bedrooms, both En suite, at the rear of the building, we had a very peaceful sleep, despite being seconds from Madrid's largest plaza. The third bedroom is at the front so I imagine it'd be a little less peaceful. There is a well stocked mini supermarket twenty seconds from the front door.
You are an easy 30 euro taxi from the airport, and a twenty minute walk to the main central station.
Mercedes was great to communicate with and was very helpful.