I stayed at Angel's place for two weeks while in Barcelona. The apartment and location are perfect. It's perfectly positioned to explore Gracia like a local, and very close to the metro which allowed me explore all of Barcelona. Gothic Quarter, Montjuic, and Sagrada Familia are all easily accessible from here. Furthermore, the rooftop is ideal for enjoying a morning coffee alone, or an evening glass of wine with friends.
Additionally, I have to praise Angel's promptness in responding. I had a small issue with the water on my first night, and he calmly and quickly handled it with no fuss. A wonderful experience all around!