We stayed at 3 places during our recent trip to Spain; two in Madrid and this one in Barcelona. This was our favorite. Its a clean, tasteful, great place in a great location. Its very central and well-connected which made it easy for us to explore Barcelona in all directions. Its a real apartment in a real neighborhood on a real thoroughfare.... meaning, its not tucked away above a souvenir shop in a medieval alley in the Gothic Qtr. Its has two, small, lovely balconies three floors above a street with restaurants, bakeries, pharmacies, etc. The metro is a block away. A couple of nights we were completely content to just hang out on the balcony with some olives and wine.
On arrival, the hosts go out of their way to meet you, provide simple, thoughtful amenities to ease your arrival and offer abundant advice about the neighborhood and city in general. I would say that group size might matter. There are two nice bedrooms, each with a balcony. We were traveling as a couple. The place could accommodate two couples very comfortably but 5 people might start to get cramped in the communal area. In any case, its a great place offered by very thoughtful folks. I'll hope for this place when we return to Barcelona!