The appartment was as described, cute and functional, ideal as a base. The roof terrace was fabulous with views of the sea and the W hotel, we enjoyed sitting out there in the evenings.
With a little research we found there were several amazing bars and restaurants within a five minute walk. Try Nappa for top class tapas and Dry martini which is virtually opposite for sophisticated cocktails.
The walk to the metro station was 10 minutes and the metro was really easy to use.
We had a fabulous time exploring Barcelona from Marta's appartment, it was ideal.