Apartment is very well located, close to metro and Pl. Espanya. We have been walking to all the main sites of the site from there. Host is very helpful and offers great tips from arrival suggestions to places to see.
We did like the interior of the apartment a lot, it has this "real feel" that you won't get in newly built hotels. Having in mind that building is rather old and authentic it can be a bit noisy from the outside or the hallway. However, neighbourhood is quite and we didn't had any problems because of the noise.