Lluis was a great host and the flat quite lovely. The location cannot be beat. Close to everything.
Be forewarned that the noise level could be a bit troublesome for those with kids planning to use the sofa bed as it is next to the windows that face the plaça. Also while the unit has an AC unit it is not as strong as Americans might be used to. It was sufficient for us.
We loved being so close to great restaurants (try kibuka!) and the metro and the ability to walk to a lot of Barcelona's sights. Lluis had everything we could need in terms of maps, guides and he really made the stay great.