Marta's Apartment is comfortable, airy and clean. The big windows provide nice views of the city and plenty of sun light. The kitchen has good amount of supplies for cooking/cleaning (no dishwasher though). Bedrooms are nicely furnished with comfortable, good quality bedding.
Marta was gracious and helpful with tips for visiting nearby places and taking public transportation including bus from/to airport which saved us a bit of money over shuttle/taxi. She was also very responsive to questions/inquiries.
The location is good for taking public buses (bus stops are less than 5 minute walk) to various places in Barcelona. We took the bus to La Rambla, the beach, Magic Fountain, etc.