Really excellent location, easy to find, close to metro, 10 min walk to the Guggenheim, 15 min walk to major bus terminal (Madrid, Barca, etc...)
Room was super comfy and clean.
Casco Viejo is touristy, but super fun, full of great food and a big, diverse crowd. You basically walk out the front door and have a massive number of bars, shops, and restaurants within stumbling distance.