Carolina's place is so great, I didn't want to leave! Its VERY central to everything you want to visit while here, yet private enough to feel like a local. Its a very large apartment, and the private bathroom makes the space your own.
She was a gracious host. I was well accommodated with towels, sheets and pillows. She also answered any questions I had an gave me great recommendations on healthy food and nightlife.
I would absolutely book with Carolina every time I'm in Barcelona. Although I love it so much, I am looking to move here! :-)