The apt is literally in the heart of the city center. It is incredibly convenient and in a great location. It is surrounded by restaurants, the large Cortes Ingles, and the best bakery in the city and across the street from Calle Sierpes. The apt looks like the photos and is basically a nice efficiency.
The only negatives were the noise. This is not the place for you if you are a light sleeper like me. You can hear some street/sidewalk noise even if the window are closed. What kept me awake though was the internal noise. Everything is marble and sound echoes off it. The chairs don't have padding underneath so you hear screeching every time someone moves a chair whether in your apt, the one next to it, or even above/below you. You can hear every conversation in the little atrium/elevator lobby. Also, beware of which bedroom you choose if you are in a 2 bedroom. I was unlucky enough to chose the bedroom that was adjacent to the next apt's living room. We had 3 different families with children check out & move in next to us during each day of our stay. All I heard was screaming, yelling, arguing and crying and screeching chairs very early every morning of our stay from the living room of the apt next door. I did not sleep well even one night of our stay here and it was the most expensive apt of the 5 cities in Spain that we visited though that was most likely due to Feria. However, my friend who can sleep through a train wreck and sirens slept fine.