Excellent flat & location! Arantxa was very helpful and a great communicator, and was accommodating when we booked only two days in advance (our previous host cancelled without warning).
She provided us with good restaurant recommendations as well. Gracia is a lovely neighborhood and we enjoyed feeling like we lived there for a few days. Not the best location if you want to be in the heart of the most touristy areas, but who wants that? Metro access is easy, regardless, or it's a pleasant walk downhill into the center of the city.

Well equipped kitchen, plenty of space, and the photos are accurate (OK--the saxophone isn't there anymore ;).