First and foremost, my wife and I did Madrid, Seville and Barcelona and let me tell you we fell in love with Sevilla. We believe one factor was Sebastians apartment. It was as advertised, clean, new modern, shower was amazing. There was two shower heads. Only issue is hot water runs out fairly quickly, but we had issues in Spain period in regards to that. The apartment was in an ideal location, safe was a bit noisy but we understood that. You want to stay in the middle of everything there will be noise. Stairs was a pain in the butt, so if you have medical issues, or with elderly it is a few flights up.
Sebastian, was amazing granted we did not meet him. He coordinated with a family member Jorge to house our luggage because we came in earlier than check out. This allowed my wife and I to explore and do tours before check in.
We highly recommend this spot, due to above reasons. Seville was awesome thanks to Guadalupe and Sebastian place!