Montse's apartment was perfect for a stay in Barcelona! The neighborhood isn't the most hip, but it was great for hitting the tourist sights like Sagrada Familia (obviously!). There is a very close subway stop that allows for easy connection to the rest of the city (the subway is great - take the subway!). The apartment itself is very nice - spacious, nice bathroom, with very comfortable beds that are located in the interior of the building so there is very little noise from the street in the front. The decor is great and the details of the building and renovation are very cool - especially the ceilings.
Montse was easy to deal with and responsive to our questions. Check in and out was a breeze. When the guests before us checked out a bit late and we arrived when she was still cleaning up, Montse was kind and apologetic and let us leave our bags in the apartment so we wouldn't have to lug them around with us. Check out was similarly easy and Montse's expectations were clear.
I'd highly recommend Montse's apartment!