Carmen's place is the perfect spot! It's our favourite of the Airbnbs we've stayed in over the years.
The apartment is spacious and bright, the kitchen well-equipped, and the bed comfortable. WiFi was fast and the air conditioning was effective, even though the unit is not directly in the bedroom. There was also a fan available, though we didn't need this.
The terraces are excellent. The lower terrace is large enough to eat outside, and the upper terrace is a sun-trap during the day and perfect for evenings when it's cooler as the cathedral etc. is lit up.
There is a plug socket outside, so we brought a lamp from indoors, as there's no other lighting.
The location of the flat is great. Triana has amazing tapas bars and has a lovely atmosphere. We were able to walk to all major sites (although it took around 20 minutes to reach the Alcazar), but public buses were within a ten minute walk too and helped us to get to the airport and the train station. The area felt very safe, and was quiet during the night (aside from some building works which began at around 7am on some days).
Carmen was a great host and offered some great restaurant and bar suggestions. We would definitely recommend this apartment for a short stay in Seville.