We had a great 5-week stay in this apartment which is just a stones-throw from the Cathedral and the beautiful Plaza Nueva. Nice and bright, especially in the late-afternoon when the sun would come straight through the windows (March/April). The street is mainly quiet and car-free, but can be noisy at night — there are a lot of bars and restaurants not on the street itself, but at the end of it.
Good communication from the host throughout our stay, Carmen met us on check-in and pointed out lots of Seville attractions. Would stay again.