I stayed here whilst attending a conference nearby. The location is great, only a short walk to the Plaça d'Espanya metro station, which connects to just about anywhere you'd like to go in Barcelona. It was nice and quiet also.
The breakfasts were great, as was the free mini-bar (especially since it was warm when we stayed there).
For two people, the room was much smaller than we are accustomed to, especially for a hotel rated at four stars. The air-conditioning didn't work very well, so after every shower there was water dripping from the walls in the bathroom, and the bedroom was humid also. Also, there were no ironing facilities in the hotel, the only option was to send stuff out for professional cleaning.
The staff were very nice however, and extremely helpful.