My family and I enjoyed our stay at Lore's Barcelona apartment. The location is great, only steps from the Monumental metro station (on the purple line). Nearby area is dotted with cafes, supermarkets and you can easily walk to some tourist sites and shopping (for example the outlets on Via Girona).
The apartment is on the "first" (second) floor and there is elevator. Kitchen has all the basic that you need to cook simple meals. Though two are singles, there are four separate bedrooms so everyone in the group can get a good night's rest. Also a TV and some board games which could provide some entertainment.
Communication was great and our late check in (we had a late flight) accommodated. Lore also provided some recommendations of nearby tapas bars and spot to grab churros w/ chocolate :)