The location is amazing, you're walking distance from all the major sites. The flat was clean and comfortable, as was the bathroom, and a good size for me and my two friends.
The only note I would make it that on Friday and Saturday night, Sevilla does not go to bed early! This means that the front bedroom, due to its proximity to a bar on the corner, has a lot of noise and I would recommend bringing ear plugs (or going out and joining the fun!).