Loved the apartment! It was super clean, tastefully designed and had a well-equipped kitchenette. We had been travelling for a week so the washer that was available came as a great bonus! The wireless internet was super fast and uninterrupted. Location wise, it is just a short walk to the Real Alcazar and Seville Cathedral (10 minutes).
"Checking in" was a breeze as Rafael had a friend, Pilar waiting for us to pass us the keys and some admin instructions (albeit in Spanish which we understood through various gestures by Pilar). "Checking out" was easy as all we had to do was leave the keys in the apartment - and we can leave at anytime so that was great.
The only disadvantage is that there wasn't many people in the building (we only saw one other person the entire time we were there) so it did feel a bit eerie when we come back at night especially since there were just two of us ladies. Otherwise, the place is perfect.