I stayed in the Berga apartment for nearly a month. Sofia's place is right in the heart of the Gracia neighborhood, a two block walk from the L3 Metro that can take you into the heart of the city, and very close to all sorts of great shops and restaurants and the Libertat Market. Sofia provided all sorts of great tips for the neighborhood and one of our new favorite restaurants, La Pubilla, was her recommendation. One of the things that I really like about this apartment is that it is on a very quiet street, making this an unusually restful place. And check in and communication with the host was very easy (Sofia even had some cold beers in the fridge for us when we arrived!)
As far as amenities goes It has a washer and drying rack for clothes, a 4 burner stovetop for cooking and plenty of dishware. There was also a Nespresso machine and juicer for making fresh orange juice. There is no oven, but there is a convection microwave that can be used. When I travel I often like a frozen pizza in the evening so I don't have to eat out. The lack of an oven made this a bit more difficult. However, this was not a big deal.
The place was very clean and Sofia provided fresh linens weekly and tidied up. You can pay an additional fee for a more thorough cleaning if you stay there for longer periods of time. The only issue that I had with the apartment is that the wifi was somewhat spotty, particularly in the main living area. Back in the bedroom area it was much better. Although I don't see this as a problem for the casual tourist, I was in Barcelona running a study abroad program and the slow wifi sometimes made it difficult to make internet calls and upload larger data files.
Otherwise my stay was great, the neighborhood wonderful, and the apartment very comfortable. This is a neat and inexpensive apartment in a very fun neighborhood.