We stayed at the apartment over Christmas and New Years. We had an excellent time. The location was excellent--metro was only 5 mins away and I loved seeing the Sangrada Familia everyday! The apartment had everything we needed and was nice and clean. The beds were comfortable. They had espresso pods for the coffee machine and other kitchen staples. In other reviews, people mentioned noise from the metro and street--but it wasn't an issue for us. We barely noticed it. The hosts communicated with us before we arrived and the check-in was easy. We appreciated the local tips and offer to call us a taxi for our departure. We'd definitely stay there again!
(For anyone travelling over Christmas holidays: Dec 24th--quite a few stores and restaurants were open til 8pm, Dec 25th--reservations in advance needed for restaurants, Dec. 26th--again, quite a few place closed but express marts open.)