Mari was fantastic! Upon our arrival which was late, she made arrangements for us with her neighbor. Who ended up being invaluable as well. We had a bottle of wine waiting for us, and it was much needed as our luggage did not make it to Spain. Mari checked on us mid way to learn that our luggage was still lost. She offered to drive me to the airport to check on it's status. I had a great time learning about Barcelona and Mari. We laughed a lot and made the best of the situation. Mari went above and beyond what I would ever expect from a host.
As far as her place: super quaint, clean, close to the metro and some great places to eat.