We stayed here for one night on our way to Portugal. It was perfect for us because we only needed a place to sleep and shower. It was also in the perfect location to take quick strolls through the old town and see places of interest like La Giralda and Plaza se España. Overall, we were satisfied with the value.
The only thing I will advise about is that there is a bit if a funky moldy smell in the apartment, probably caused by it not being aired out regularly(???). If you are sensitive to smells I would keep this in mind. I had difficulty falling asleep because of it but everyone else in my family was fine.