Esther is one of the kindest hosts I've ever met. She is the kind of person you instantly want to befriend. Upon my arrival, we had some wine and she provided me with many tips (bars, places to go etc.)
The flat itself is spacious and located in Eixample. I loved it: quiet and refined neighbourhood; there are many bars, cafés though. And gay bars (Eixample is also known as Gayxample :))
I totally recommend Esther's place to everybody who wants to stay at a cool and affordable place in the heart of Barcelona. I'll come back for sure!