I booked months ahead and contacted Alberto only the week before I was scheduled to arrive without problems. Very responsive and friendly. Upon arriving Alberto introduced me to the flat and gave very useful tips where to go (or not) and what to do. During my stay he contacted me just to see if everything is alright and also offered to help with transport back to the airport. All in all a really personal and helpful host.
The location is at the entrance to the Old Town and has dozens of bars, cafes and restaurants within walking distance. for a single or couple traveller(s) this is a really great place to base your visit to Sevilla from.