I spent Christmas in Christina's apartment with my three adult daughters. It suited us perfectly. There is a well appointed kitchen which enabled us to cook our Christmas lunch and two bathrooms with excellent showers. The beds were comfy (although for others booking they may be smaller than at home) and there was plenty of space to spread out as the apartment is quite roomy.
The apartment is well located and in walking distance to most Seville sights.
Christina is an excellent host. She met us upon arrival and talked us through everything we needed to know about the apartment as well as answering general questions about Seville. I would certainly recommend staying here to others.