Super clean and nice apartment with all amenities you'd need for a short or longer stay. We stayed for two weeks and everything was fine and we felt very safe in the apartment. The bed is comfortable and the blanket big enough for two people to share without fighting over it, the shower is very spacious and the bathroom was very clean. The kitchen looked so new that I think we were the first to use some of the appliances! We didn't use the sofa as a bed so not sure how comfortable it would be, but it's very comfortable for sitting and watching TV (which is a smart TV so also connects to Netflix, Amazon Prime Video, etc.).
The Lodging team was super communicative about our arrival and also helped us carry our many suitcases up to the room (there is an elevator, but it only takes you to the landing between two floors, so you have a couple of steps to go before you reach the apartment). We had issues with the wifi upon arrival, but they were quick to respond and sent out a technician to fix it as soon as we told them about it! There were little complimentary shower articles in the bathroom, but no toilet paper and the hand soap was very low when we arrived so that could have been improved!
In terms of the location, it is excellent, just around the corner from Passeig de Sant Joan, which is lined with nice street cafés and restaurants. It's close to La Sagrada Familia and a 10-15min walk from Passeig de Gracia, which is one of the main shopping streets and also has the Gaudi houses. La Rambla, Gran Via de les Corts Catalanes and Plaça de Catalunya are a bit further (about a 30min walk), whereas the beach is probably around 45mins to walk. La Dreta de l'Eixample is a really lovely neighbourhood that is quieter than the city centre, has more small independent shops and is less over-run by tourists.
The only thing to note is that the apartment is located on Carrer d'Aragó, one of the largest roads in Barcelona, so there is loud traffic around the clock (expect to hear the bins gets emptied around 1am each night) and opening the balcony doors or windows is quite deafening. You gets used to it after a few days, but definitely bring earplugs if you're sensitive to noise!
Overall would 100% recommend, it was the perfect place for us to stay and we'd love to return again sometime!