We were 4 guys staying in the apartment in November and we were really happy with our choice. it is not too far from La Ramblas (15 minutes walk) and it is in a really quite street (great sleep).
I did not have the chance to meet Vanina directly since my friends staying with me arrived before me, but from the exchange of emails we had, I really liked the fast answers and that she really cared about her guests.
I can only recommend the place.