Carlos apartment is well positioned in a residential/quite area but close to the port olympic, Barceloneta and parc de la ciutadela, and not so distant from la Sagrada familia - we never had to take any public transportation. There is a small grocery shop just crossing the street and something larger like Lidl not distant.
The interior is functional and clean, all you need for a touristic stay. The room could not fit the additional bed in, take it into account if you have a small kid and would like to sleep in the same room but leave them in their own bed - no issue otherwise, you open the sofa or the bed and use the living room as the second room.
Visiting in may, the swimming pool was still empty and not usable - not sure if we were up for a swim, but i did
not notice the condition in the description.
Communication with Carlos was nice and easy, clear messages and instruction via whatsapp.
Overall a pleasant stay, thanks Carlos!