I spent one month at Morgan place and enjoyed it, she is as kind and helpful as all the brazilian people I know, gave me some good tips concerning things to do in Barcelona. The appartement is well located, quiet street, 15 minutes by foot to the center, so no real need to take taxi or worry about public transports :).
We couldn't meet that much because of our different schedules and work but when we met, we had some nice conversations in spanish :), it helped me to improve my spanish a bit.
The appartement is cleaned once a week, nothing to complain. I would recommend Morgan as a really nice host and would probably come back because I fell in love with Barcelona, such a great city :)