Staying with Rosa is very much like staying with a relative. She is welcoming and warm. She will give you as much freedom as you like or be a part of your trip if you so desire. She is a great hostess. She made our bed and cleaned the bathroom every day. We made a real connection with her and she shared several meals with us out on the town. She was a wealth of information regarding Barcelona which was helpful for us since we had ever been there before. She speaks Catalan, Spanish and English. For us it was a real plus that she has 2 cats. We left 2 cats at home and we were really missing them, but her cats made it easier for us.
We made great use of the Metro system which will take you just about anywhere you want to go. Make sure you buy the T-10 ticket which gives you 10 rides on the subway and the card can be used by more than one person simply by handing it to another person after the first swipe.
When we arrived, we were the only guests in the apartment so we had private use of the bathroom. For the last 2 days of our stay, there was a single young woman staying there and we shared the bathroom with her, but this did not interfere with the pleasure of our stay in any way.
The apartment is in an apartment building in a quiet neighborhood. It is on the 6th floor, but there is an elevator. If we are ever in Barcelona again, we would definitely stay there again.