This is a really beautiful flat. The layout works well with the living area below and the bedroom, bathroom and terrace above. The terrace, in particular, is really nice for breakfast and has a shade you can pull over the space if it gets hot later in the day. There is some building work going on nearby which was noisy while we were there but looks to be short-term only.
The flat is in a great location, with great tapas restaurants and the main sights all within a 5-10 minute walk. Because the flat is at the top of the building, you don't hear much noise from the street, which is pedestrianised anyhow. There are aircons on the lower and upper floors so the flat never gets too hot.
Of the two places I stayed in Seville, this was the cheaper option but definitely the one I would recommend. Paula, the host, has made a lot of effort and if you like the decor in the pictures then you will find the flat as described.