Ruben is really interesting person to meet! Good english, so you can communicate easily. Keen to advise what to do in Sevilla, and he provides some brochures about worth seeing places around. I encourage to spend some time together at evenings, he plays guitar and teaches music professionally- this can be curious experience.
Apartment has 2 rooms: one is Ruben's and second- for guests (with separate bathroom). All nice and clean- he lives there (instead of some hosts who only hires apartments, living somewhere else- their conditions can vary...).
Highly recommended!