I stayed a month at Erna’s and it went well. She made checkin and checkout very easy and was very prompt to answer/help when I needed her. She is very kind. The place itself is an old house, very authentic yet a little bit rustic. The location is IDEAL. You will never walk more than 10-30mn to reach a place. I would definitely recommend if you plan on visiting Sevilla a lot, and crash somewhere at night!