Concha's place is well-located, in walking distance from the historical center. It's like 5 mins from Setas de Sevilla, 20 mins from the Cathedral and ~30-35 mins from Plaza de Espana.
We had all the amenities needed to enjoy our vacation (we could use the washing machine to wash our clothes and cooked breakfast + coffee in the kitchen, which we could enjoy on the beautiful, sunny balcony).
Concha was also very nice and friendly.
For us, it was the perfect place to enjoy Sevilla. Would definitely recommend.