First, let me just Sara that Sara was by FAR the best Airbnb host I've had. She was incredibly accommodating and had this great little booklet of things to do, restaurants, maps, types of metro passes, etc. in Barcelona.
When we first arrived, she was just finishing cleaning the place which was SPOTLESS. She showed us around, had water, beverages, and coffee available to us if needed, and then explained everything in the booklet.
About the apartment:
There were three rooms, 2 with doubles and 1 with 2 beds. Our family of 5 slept very comfortably. Each room has air conditioning and there are plenty of windows. But the best part are the balconies. One of the rooms had an INCREDIBLE view to the east of the ocean and the World Trade Center Barcelona. The other balconies were to the north facing the Old Town. The location is excellent, I couldn't ask for better. There were metro stops very close by.
Other amenities: fast wifi, coffee and an espresso maker, guidebooks and recommendations.
I highly recommend staying here. Sara made it great. I felt like I was supposed to hug her when I was saying bye.