We stayed at Elisenda's and Neus' Apartaments for 3 days with our 6 years old son. All was OK, Apartament was clean and cosy, very close to Sagrada Familia.
There were some food and drinks for us. Hosts were very pleasant and gave us good advices about Bars and Cafes in Barcelona. There was only one unusial thing - all windows are inside, so no sunny light at the apartament thru all day.. but it's OK, if you are not staying at home durind the day..
I recommended this Apartament.