My friend and I stay at Silvia's place for two days, it was a very pleasant stay. Silvia is very nice and patient, she also provided a lot of useful information, like attractions and good restaurant (the pizza place called La B she recommend, I had the best pizza i ever have).
The apartment is located in a quite and safe neighborhood, just 5mins away from metro, close to many restaurant, cafe, bakery and supermarket, which is cool.
Also, it is tidy, cosy, and beautiful, no matter Silvia or the house, they are excellent! Sure will stay again if come to Barcelona~