Luca's place is a wonderful place to stay if you're visiting Barcelona for a few days with a large group. We were with a group of 7 people and the house fitted us perfectly - four bedrooms (3 with double bed, 1 with single bed), a small living-room area with a couch and a kitchen table with enough chairs.
The kitchen is quite small and there is not a lot of (very clean) equipment in there, so I wouldn't suggest cooking a large meal for 7 people in here ;) The one downside of the appartment is the bathroom: there is only 1 and it's tiny, and the toilet is in the same space - which is not very comfortable when you're with 7 people. But that is one the listing, so you know beforehand :)
Luca is super friendly and quick in communication, so all of that went wonderfully. The appartment is close to metro and a street with shops and the centre and the airport so all of that is perfect too!
So if you're demands are not too high and you're just in the home for sleeping with a large group of people, this house is perfect. :)