Flor is great host, she is communicative, always answer my question about her place and anything although quite difficult since I don't speak spanish and she speaks few english.
Location was center, in front of La Ramble and Liceu metro station. But the address is difficult to find, except you can call Flor and she will pick you up on the alley.
Overall her place is good, clean, center and I recommend this place for you to stay at Barcelona.