Brilliant location - within easy walkable distance to the central, to Museo Reina Sofia, the station etc. The flat was very clean with good quality towels. The shower gel was come with but you might also want to bring your own ones.
I shared the sofa bed with my sofa which was fine as the bed was big enough. you might need an eye mask if you are very sensitive to light as the curtains are not the 'black out' ones (only if you need to use the sofa bed).
The balcony was the highlight of the flat, really stunning and spacious - both mornnig and night (good view of the junction and fountain).
Had very good communication with Daniel who was so helpful and quick to respond. He also helped us book an airport transfer.
100% recommended