Sergio was our saviour, as our party of seven was stranded the night before we were scheduled to arrive in Barcelona because our host cancelled on us due to an emergency. Sergio was very responsive and helpful, and allowed us to check in very late as well. The place is well-equipped, with nice towels, linen, cutlery, and dishes. The rooms are very comfortable, and our large group did not have any problems staying here. The extra bathroom really helps with a large group. The location is probably the best thing about the apartment, as the city centre is only a short and pleasant walk away. There are a lot of very nice bars and eateries in the area, and it is a really nice place to stay.
Although the apartment also has a dishwasher and a washing machine, the apartment did not have washing powder/liquid or dishwashing tabs. These small additions could help make the apartment even more comfortable for guests. Having said that, it is a great apartment, and I recommend people considering Sergio's place to go ahead and book his place :)!