My family, including 2 young children and my in-laws, visited Barcelona and stayed at Mariana's place. We had a great time and the apartment was perfect for our family unit.
The location was fantastic. We were able to walk to Sagrada Family and to the Gotic neighborhood.
The space was great too. There is a secure Foyer Entry with an elevator. The interior of the apartment is nice and spacious.
If we get a chance to return to Barcelona we will be sure to look up Mariana's place first!