We enjoyed our stay. Large, new, and very comfortable.
The location was great. We enjoyed being steps away from the river and went for a run or walk along the paths every day. It was a short walk to the major sights, restaurants, grocery stores, etc.
One thing to consider is that it is a busy street. There were just the two of us and the bedroom is far back in the apartment with a door, so noise was minimal. If you are a light sleeper and using the sofa bed in the living room, you may get woken up if a large truck goes by in the middle of the night.
We would definitely stay again if we were in Seville.