The apartment was in a great neighborhood close to the metro. The beds were comfortable and the entire apartment was spacious. The two loft rooms were ideal for our kids, though they did get very hot with the heat turned on. The main bedroom did lack privacy, but if traveling with a large group they may not be an issue. It wasn't an issue for us.
If you are sensitive to light while sleeping I'd recommend bringing an eye mask to sleep with as the Windows are large and plenty of light comes in from the street above.
Hopefully they will fix the ceiling in the bathroom that did leave a faint musty smell to the room.
Even with these minor inconveniences we would stay here again.
The neighborhood is fantastic, the location is perfectly close to restaurants, bars, shops and just 2 metro stops from Plaza Catalunya. Park Guell and all the other modernismo wonders are plenty close. The hosts were very friendly and left plenty of info for us at the apartment. The kitchen is well supplied, though kitchen towels would have been nice.
There are laundry facilities, if you plan to use them be sure to ask how! The drier is ventless so you must empty the water basis after each load.
Would recommend for families traveling together!