Pros: This is a really nice and modern updated apartment. The location in Gracia was perfect, we will definitely stay there again. It was a block off a beautiful, lively square with restaurants; walking distance to shops and groceries; a 5 minute walk to the metro; two blocks off Passeig de Gracia. The communication with the management beforehand was excellent and immediate; they had a driver waiting for us at the airport, and Sergio, the wonderful rep who checked us in, was right on time even though our flight had been delayed 4 hours. Good air conditioning and wifi. Lovely bathroom, and the full size bed was excellent. I cannot say enough good things about this neighborhood of lower Gracia.
Contras: There were some quirks with some of the appliances, which I'm sure they would have taken care of but it didn't impact our trip. The only real problem was the twin bed in the smaller bedroom was really uncomfortable.