There are some places that make you want to drop everything and move there, and Sevilla is one of those spots, and Cristina's home is where I would want to live. When we arrived, she gave us a great place to park the car, and we never had to drive anywhere afterwards, because everything is in walking distance. The Flamenco museum is quite literally next door, where we saw a live performance. The Cathedral and Alcazar are within 10 minutes walking (where Cristina recommended a classical concert in the Alcazar gardens at night for only 6€ a person, and felt like I was a local in on a well-kept secret) and the restaurants - the best - are all nearby in the labyrinth of alleys.
Cristina is an amazing host - one of the best we've had. English is superb. She had bread, fig jam and goat cheese on the table with a bottle of chilled cava, and classical music playing in the background. The A/C was already turned on when we walked in from the June/July summer, which was perfect. The house and rooms balance the historical architecture with modern design and decor really well. She was very responsive and helped us plan our itinerary, even helping us order a taxi when we needed on.
I definitely plan on coming back and staying at Cristina's home. My only recommendation to you is to stay there as long as possible. We only had 2 days and 2 nights, and I wish it was more.