I took my girlfriend to Barcelona for our anniversary and I wanted everything to be perfect and it started perfectly with Frank's apartment. The chillax apartment is so nice you'll want to stay there and chill.
It's clean well decorated and really convenient as it is close to everything. 10 minutes walk from El Gótico, 10 minute tube from la Sagrada familia. Frank himself took the time to give us a few tips.
I really recommend this place and would go back eyes closed