What a lovely place to spend some time in Seville.
That apartment is dead central - about a 3 minute walk to the cathedral / real alcazar palace, both of which are wonderful and obviously worth a visit. We spent a lot of time relaxing at the apartment seeking refuge from the punishing August sun and we were very comfortable.
The view from the top terrace is stunning, especially when the sun starts to go down.
I highly recommend this apartment and a visit to Seville.