This apartment is so central in Seville and made our stay very enjoyable. Everything we wanted to do or see was within a 15 minute walk.
The building also felt very secure with a keypad lock system, 24 hour camera surveillance, and good building lighting.
The apartment itself was very spacious for two people, but may feel cramped if more people are also sleeping on the living room sofa. There are two full bathrooms (shower, toilet, sink) surprisingly in this one bedroom unit. The cleanliness was mostly good but there were some areas that didn't seem as well cleaned (eg. stains on walls not wiped), but generally it was clean enough to feel comfortable. Also, one other weird note is that there are a lot of windows in the apartment that don't face the outdoors, but instead into the hallway. They are covered by curtains so privacy is not a worry, but there will be light from them even during night time.
Overall an amazing and affordable stay right in the heart of Seville and I would definitely book again!