Our trip to Barcelona was overall great lots of things to see and do. The apartment is in the Gracia neighborhood. You can take the train to capitalon or just walk it for about 30 minutes down the main drag. Apartment is small, but neat and clean. The hot water has a capacity of 1.5 person shower. We alternated two in the morning and two in the evening to maintain hot water. We ran out of clean towels in about three days and needed a replacement, we had to ask for a replacement set and it was left back in the room for us. There is AC and heat in the rooms and the common area. We brought our fire stick with us which made it convenient to watch home-based channels. There are two supermarkets up and down the block and very convenient to purchase drinks and snacks and water. There is a nice Square very close which has breakfast ice cream empanadas etc.
we took the aero bus from the airport to the last stop, and then walk 30 minutes to the apartment. You can also take the metro which is probably a better option since it would also include the transfer to the second metro. From the aero bus, there was no transfer to the Metra. The price for metro with the airport zone is about 520. For our departure, we took Cabify which is their lift. That cost us about $30 so pretty comparable.