I really liked our stay in Rocio's AirB&B. It was close to the Giralda and the river, in a street with really nice bars. It was lovely to spend the afternoons after all the sight-seeing at the river (reading and drinking coffee on 1 minute from home).
Rocio was very kind and helpful. She gave plenty advise on what to see and where to eat.
The appartment itself was simple, but very functional and clean. Everything we needed was provided: shampoo, towels, washing machine, so we could travel light. Her taste is a bit artistic, and the appartment was fun with all its mirrors.