Extremely nice place! The location could barely be better, you are in 15 minutes walking to the historic center and most of the attractions, including the airport bus stop, public bike system stations nearby (I strongly recommend getting the bikes, is just ~13€/week and you get the first 1/2 hour for free on each ride, which is more than enough to go from one spot to the other). Joaquín is very nice, helpful and relaxed, he has tourist guides and a bunch of personal recommendations of places to eat. On top of that, he answered any questions I had via AirBnB usually in just a few minutes.

The place is small but very functional, ideal for a couple but I went with a friend and thanks to the sofa bed in the living room, it works out just fine for friends too. The only downside is the flat is quite dark, very little natural light, but I guess for Sevilla that's a plus given that it is sooo sunny :P, so, you'll probably will want to spend time in the flat only to sleep ;-)