Marta's place is a very lovely and cosy place, with a comfy bed and nice furniture and decoration.
The neighboorhood is great : just a few minutes from the historic center, and just across the street, a very nice square with cafes.
The only downside is the noise on mornings during the week because of the school situated nearby. But during weekends and holidays it's a very quiet street.
I recommend Marta's place for anyone wanting to discover Sevilla from an insider point of vue and with a small budget!