I had a real pleasant stay at Ana's : the flat and the atmosphere are very cozy and welcoming; Ana is warm, friendly and available for any of your concerns. For my part, I was hunting for a long-term flat in Barcelona and she provided me with some good advice.
About the location, the neighbourhood is quiet and safe, you have several small businesses around including a supermarket Consum. It's also easy the reach the center of the city as the metro station (L4) and bus station are only 2 minutes away from her flat.
I do recommend a stay at Ana's!