Ewa's place is really nice. The location is great and close to many eateries, the metro is very close by and everything is super accessible. Ewa was very warm and friendly. She always responded promptly to our questions and was there personally to meet us, when we arrived. She guided us through the apartment herself. While doing so she noticed the coffee was missing and she went back and grabbed that as well!! That was super nice of her. We wanted laundry services one of the day's of our stay and she was nice enough to arrange that as well. The apartment is nice and cozy for a group of 4. Shower area - the bathroom is good and clean. The only con is the flight of stairs up to the apartment but given the location and everything else that can be ignored.
One of the best things about dealing with Ewa and Pau was the document that they share with you - it has lots of recommendations on restaurants and great itineraries that you can refer to. Almost everything you might need for your stay in Barcelona is in that document. It clearly shows Ewa and Pau's commitment towards this.