Very good apartment in the heart of Sevilla, you can really do everything by foot (max 15 minutes), so it is very convenient when you are only staying a few days, and you can save transportation fees.
Mercedes was very friendly and reactive, also we arrived after midnight and she was very consilient and didn't ask for extra fees like some other host.
The only inconvenient is that the wifi is very very slow, I had to do some work during my stay and I had to use my phone's data because the wifi was too slow, but except from that everything was really good.