The positives: Carlos is a great guy, and very helpful. The apartment is very quiet and the bed is comfortable, which counts for a lot. The little nook overlooking the rear courtyard is a wonderful space for sitting and having coffee, etc. The location is great - easy walking to Sagrada Familia.
The negatives - the building is old, and the apartment reflects this. The kitchen is small, no dishwasher, and really feels dated.