This is an excellent choice for 2 or 3 couples vacationing in Barcelona. For location - it's only 2 blocks from the Sagrada Familia (you can see it from a window) and a metro station, making it VERY convenient. This is a very residential area so you have many choices for restaurants and supermarkets all within a few blocks.
The apartment is well thought out and comfortable. It's an "L" shape with one bedroom and bathroom on one end, and two bedrooms sharing a bathroom on the other side. Both the rooms and bathrooms are spacious (especially by local standards), and there is a washing machine/dryer as well as a full kitchen with dish washer. There is a small dining area and the "family room" with the couch and TV which is part of the kitchen - which isn't an issue since you didn't plan on visiting Barcelona and staying in your room all day. The building has a lift (elevator) and I really appreciated the Smart TV so i could log into Netflix!
This was our home for a few days and it felt like home. The hosts were great - everything from clear communication to having a bottle of Cava in the fridge when we arrived (which we really appreciated after a very long plane ride!). There's no surprises in this listing - highly recommended!