The flat is great, super clean, modern and spacious. It's also pretty well situated, close to the city centre (20 min walk) but not too close to the crowds.
Nacho is a very nice and responsive host, and is flexible whenever possible.
This apartment is great if you're out visiting most of the day, but as it’s in a building made in the typical Sevilla style, it’s unfortunately kind of noisy as the flat's windows overlook a very echoey courtyard. So I wouldn’t recommend it for people who want to spend a lot of time inside, but if you plan on being out from morning till evening then it’s perfect as the nights are pretty quiet.