Enric and Packo were very nice and welcoming. The apartment is very well located by the Sagrada Familia (you can literally see it from your bed!) and metro. It's clean and has great amenities, they even lend you a phone with data to take with you on your visit to Barcelona!
My only concern was that the ceiling of the top floor was way lower that I thought based on the pictures. I couldn't stand and had to bend almost 90 degrees to get to bed. Not a huge problem since only the bed is there, but something to be aware of. Also, the stairs from the entrance to the actual apartment are *quite* narrow (which is common for old buildings in Barcelona).