Luis's apartment and overall process was absolutely perfect. When we checked in it ewas extremely fast and professional, but we were also offered really useful local tips and maps for food, transit, museum visits (book Alcazar tickets ahead to skip the 2 hour+ line!), etc.
And the apartment itself was clean, comfortable, and incredibly central. We took one cab the whole time we were there; walked everywhere else. The AC works super well, the beds and showers are a pleasure, the kitchen is nice, and the views of the Murillo gardens across the street are lovely. Oh, and the apartment had its OWN washer/dryer, the only one I saw while in Spain :)
I also had some special circumstances for my departure and Luis went out of his way to help my wife and I. HIGHLY recommend.