This was a great stay. The apartment is spacious, well equipped and in a fantastic location. One tiny tiny thing --- Maria provided a wifi router but I had to buy the SIM card myself. It did not work that well. (I tried both Orange and Vodafone.) I ended up using a hotspot but I'm a little miffed that I dropped over a hundred euros on the SIM cards that barely worked plus another hundred for my hotspot. And I noticed that large crowds in the plaza seemed to choke the bandwidth around 6-8 pm M-F. I suspect it's from the crowds lining up to get into the Reina Sofia for free.
Other than that, I really enjoyed staying here. I do recommend it but if wifi is important to you, keep this in mind.