The negative: the house is tiny for more than 2-3 people. I'm appalled that Airbnb allows them to rent it out to 6 people. The beds are almost on top of each other, and the place looked and felt like a hostel. We were in Barcelona for a work trip, and had to last minute get another hotel which costed us nearly $1000 extra for the week. I would never have booked it if the photos accurately captured the space.
The positive: It was very clean, the hosts were communicative, and there are some really nice touches to the space. If you're a couple or a small family, it will be perfect - but just don't book it for 5-6 people unless you're looking to set up a hostel.