Gan is a really kind and welcoming person, knows a lot about Barcelona and she is always willing to help the travelers.
Her place is good, clean and very well located. There are some things you have to consider if you choose her place. The room has no ventilation at all and her apartment has a central air conditioning, so if it's turned off you might have some difficulty sleeping.
To get to the apartment you have to go up three floors, not easy since there is no elevator, unless you travel with a backpack.
The wifi doesn't work really good at the room, so you might have some difficulties to connect.