We spent a long weekend and this place. The place was spacious enough for 8 people with 4 spacious bedrooms, two of which have beds for couples. One bedroom has two narrow beds on different heights, which was a minor issue.
The place itself was really tidy with all the necessities to manage for a few days. Bonus points for two bathrooms with showers.
The check in was extremely easy. We called as we left the airport and there was a friendly guy waiting for us at the location. He gave us maps of Barcelona and some tips about what to see and do. The location was really good, just a 5min walk from Sagrada Familia but also on a quiet street. Lots of restaurants, markets and bakeries nearby also.
Overall a great price to quality ratio that I would recommend any day for bigger groups.