In short, staying at Cecilia's was absolutely great.
She is a very welcoming, warm and friendly host and makes you feel very relaxed and at ease. I just happen to really like the flat and the way it is decorated, so I felt instantly at home (I kind of wish it was mine!)
But in more practical terms, it's clean, comfortable, great coffee, excellent balcony and the neighbourhood is interesting, not too noisy or difficult to get to and I think it's nice to be a little bit away from the craziness of the centre.
I wish I could have stayed in Rome and her flat longer and if she was happy for me to do so, I'd certainly stay again.