We stayed in Andrea and Jesse's place for almost 2 weeks in March and April during the week before Easter. We love Gracia- it is a great area rich in local flavor and not at all touristy. That said it is easy to get wherever you want to go via public transportation. There are excellent restaurants and shopping literally down the street.
Andrea and Jesse were excellent hosts. They were thoughtful and responsive to our questions and needs. Checking in and out of the apartment was very easy. The apartment is lovely. It is clean, stylish and spacious. It worked very well for our family of 5. The beds are very comfortable, and it was great to have 3 full bathrooms with nice showers. And the deck is a great place to spend time on a sunny day.
Our only added comment would be that there is a nightclub right next door, and on the nights that the club was open it was quite loud in the apartment. When the club closes crowds seemed to congregate in the street and square, which could be noisy as well. While we were in Barcelona the club was not open every night, so this was not a daily issue.
In summary we had a wonderful vacation and stay at Casa Carmen, and we highly recommend the apartment and Andrea and Jesse as hosts.