Paola was very accomodating, any questions we had before the trip she replied instantly, even when I dropped a message late night. She let us know a few days before arrival that she can't welcome us but a friend would help and so it was; no surprises.
The location of the apartment is excellent! Just a few minutes walk from the green metroline, which will take you downtown in case the circa 20 minutes walk to the La Rambla is too much for you.
We were on a family trip, six people, age of 20-30 and 50+ and no one had serious complaints about the flat. I have to tell you though that it looks better on the images. The walls were thin for my taste, especially in the room next to the kitchen - don't sleep in there if you wake up last of your company. We didn't use the second shower as it was too small and we splashed water everywhere when tried it. No big deal.

All in all it's a good place, recommended!