Frederic and his coworkers were very nice and reachable when we needed any help. Their office is in the same building as the apartment and they had great tourism tips!
The apartment itself was very clean, modern and hip and we were very comfortable staying there. There were little markets and a grocery store not too far away which made it easy for us to grab food and make breakfasts at home.
The location is very close to La Sagrada Familia which is good if you are sightseeing however further away from the more busier shopping areas of the city. It was very easy to take the metro to other areas of the city. The neighborhood was quiet however there are cute cafes nearby.