This is a cozy apartment in the heart of Barcelona, great for a couple. It's located within walking distance to major landmarks like Sagrada Familia (you can see it's tips from the balcony!), Triumph Arch and Plaza Tetuan and the Born district. There are many great restaurants, cafes and bars in the area too. Chocolate Sampaka, a world-known artisan chocolate maker, is a 20-minute walk.
For its size, the apartment is well equipped: it has a small kitchen with a sink and a two-burner electric cooktop, a washing machine + a drying rack and an iron, and a dining area. We definitely felt a bit crammed, but at the same time the place felt romantic. There are a couple of things worth noting that aren't mentioned explicitly on the listing.
First, the building doesn't have an elevator. While not uncommon for the area, the staircase in this particular building is very narrow and steep. It feels like a little hike every time you go up which is a great way to burn some extra calories after those hearty Mediterranean meals. However, lugging the suitcases upon check-in and check-out was somewhat painful. The place is better suited for light travelers :)
Second, the place doesn't have as much privacy as we had expected it to. The patio is very gorgeous, but it's accessible to all tenants in the building. One time when we were in the apartment, the neighbor kids ran up there to play. That said, the patio is very beautiful as the pictures witness. Also, the drapes on the door and the windows are pretty thin and make you feel like you're in a fish tank.
The communication with the host was fantastic - we were able to arrange our arrival at the time that worked for us, and Arian checked on us over the phone/text multiple times during our stay.
Overall, I think we got a very good value out of this booking, for the price and location. Would recommend Arian's place, with a couple of caveats mentioned above.