I can honestly say the apartment is just as beautiful as the pictures suggest. Mari has done a wonderful job with the decor and making it comfortable for my mother and I to stay for the weekend. She greeted us when we arrived and gave us a bottle of wine, which was a lovely surprise especially as we arrived late in the evening. Theres a handy lift so we wouldn't have to carry out bags up either.
The apartment is situated so so close to the famous Sagrada Familia by Gaudi and it is a breathtaking place to visit. It's a lovely area and we felt safe walking around at any time. It's walking distance (20mins ish) to Carre Gracia where there are lots of brilliant shops and other Gaudi sites and other wonderful destinations.
Mari has a selection of books on Barcelona in the flat which were actually very useful helping us decide what to do whilst there. And we ended up visiting some places we wouldn't otherwise have known about. Mari also , very kindly , supplied us with a useful easy to follow map upon our arrival which we referred to at all times during our stay. She pointed out some things , such as the Park Guell , which we wouldn't have visited otherwise, but I'm so glad we did as it was spectacular!
I've fallen in love with Barcelona and would honestly say I'd love to take more friends/family there. If I return I would have no hesitation on staying at Mari's again. It's a perfect little flat and such a lovely host.