I can 100% recommend Andra’s apartment.
It is located in Eixample, with great infrastructure, right next to Sagrada Familia.
Apartment is spacious, you can enjoy your privacy as well as socialize in dining or leaving room. The interior design is very pleasant and apartment is crispy clean.
We especially enjoyed the very well equipped kitchen, as we cooked a lot (There is market, supermarkets and local shops around).