We stayed in Alberto's apartment for only two nights but had a wonderful stay. I did not get to meet Alberto personally as my girlfriend arranged to pick up the keys but he was very kind in offering to pick her up from the bus station.
The apartment was very clean and had everything we needed for a short stay and even had a few breakfast items such as bread, jam, milk, etc. which was a nice touch! Although not in the centre of Sevilla it was very easy to get to by bus and metro from the city.
We had a great stay and would recommend Alberto's place to anyone wishing to stay in a nice apartment in Sevilla.