If I could give 6 stars, I would. This was one of the best Airbnb's that I have stayed in and would highly recommend for a group of 1-4 visiting Seville. Not only is it incredibly spacious and comfortable but the location is outstanding. Walk out the door and you'll be next to the best restaurants, bars and attractions in town. My mom and I stayed here for 4 nights and did not take a car once because of how perfect the location was. Yes, it was a tad loud on Saturday night but it did not hinder us from falling right to sleep.
Martin was responsive, helpful and his wife met us at the apartment to show us around the day we arrived.
Only thing I would caution you on is allowing enough time to wash your clothes since you have to hang dry everything (which takes a bit of time to fully dry).