My wife and I stayed in Magda's lovely flat for a week and our experience was simply awesome.
The flat is neat, clean, spacious, and nicely furnished. There is an elevator to the third floor and, even though it is located down town, the flat is surprisingly quiet at night. There are two large bedrooms and a single large and very modern bathroom. The kitchen has all of the basics: stove top, oven, refrigerator, microwave and dishwasher. The flat is also equipped with a washer and dryer. The location of the flat is ideal: a block from Placa Catalunya and La Rambla and just steps from convenient Metro and bus stops. There are loads of decent restaurants within walking distance. The Boqueria market is a five minute walk away and there are convenience stores and grocery stores nearby, so purchasing supplies for breakfast and snacks is easy to do.
Perhaps the nicest touch is that Magda coordinates with her guests and meets them at the flat when they arrive so that she can personally explain how the appliances work and deliver the keys. Magda is also a font of helpful information and will answer any questions that you may have. As an added bonus, her restaurant recommendations are excellent.
The bottom line here is this: I highly recommend Magda's flat without reservation or qualification of any kind. In fact, my wife and I intend to return soon to Barcelona and we will stay in Magda's flat when we do.