Maria is a fabulous host who provides lots of really helpful, practical information to enable you to make the most of your time in Barcelona. The apartment is excellent and exactly as shown. There are many nice places to eat just out the door and a supermarket too. And the metro gets you to anywhere else very quickly. It's in a great location - handy to Metro (4 mins walk) and it's lovely seeing Sagrada Familia every time you come and go. It's also super handy having 1 1/2 bathrooms :-)
I definitely recommend Maria's if visiting Barcelona.