Mercedes is an amazing host! Extremly kind, she is responding very fast and also gave us a lot of helpful tips. The heating stoped working during the first night. Mercedes explained that this may happened during heavy storms (there was a huge one this night) and fixed it ASAP. She also left a box of chocolates and a note for my moms birthday, which was very charming and thoughtful!
The apartment is the same as in the pictures and was very clean. The location is great, about 5 min walk from Sagrada Familia and two metro stations.