I picked this listing initially for the great reviews on Rosa, and she definitely lives up to the hype. However, I did end up canceling my stay because I did NOT have my own private bathroom, I ended up having to share the small bathroom with TWO other people.
Nor was it quiet for me, i stayed the night and could not sleep. I stayed at two other places in Barcelona, one even next to Las Ramblas, and had nice, quiet sleep at night. But, for light sleepers, be aware that the room is right next to the front entrance with the typical four deadbolt lock so you can hear people coming and going at night, which unfortunately during my stay, included three people between 1:30-2:30 in the morning, and a baby in the apartment above that woke up crying at 3:00. Also, someone staying there at the time smoked and the place smelled terribly of cigarette smoke.

So, yes, you will love Rosa and her hospitality, and yes she is a fantastic host. It's just unlucky for me the circumstances that were not in her control that made my stay not enjoyable. Thankfully, I found a great alternate place that took my last minute reservation and slept like a baby for the rest of my trip!