I would strongly recommend staying with Maribel! Her location is prime in Old Town, and several restaurants, shops, and major landmarks are in walking distance. My experience was very unique, because Maribel goes out of her way to really make her guests feel at home - there is food exclusively for guests in the fridge, and she provides a map of the city when you arrive. She is also very, very easy to contact if you have any questions and provides great suggestions if you are looking for something in the city. She is the sweetest, and I had a great experience with her - will definitely stay with her again!!