We loved our stay at Alvaro and Pol's apartment. We arrived very early in the morning and were allowed to leave our luggage at the lobby which was very convenient for us to start exploring the city right away. The flat is only one block and a half away from the Tetuan metro station, but if you aren't on a rush you could easily stroll to most attractions like Passeig de Gracia, Arc de Triomf and Sagrada Familia and get there in 20-30 mins. If there's something I could highlight is the price per location ratio: the flat was worth every penny considering how close it is to everywhere you want to go when you visit Barcelona.
The apartment is exactly as pictured and was perfect for a group of 3. The kitchen is fully equipped and if you need anything there's a convenience store 2 doors from the flat.
Finally, I did want to highlight a tip if you decide to stay, that a faint sewer smell comes from the bathroom window. But if you keep the door and window closed as we did, the smell calmed itself after a few hours.
Overall loved our experience with Alvaro and I'll be definitely staying with them again when I'm visiting the city.