Staying with Fabiana was a wonderful experience! I stayed for one night, before catching an early flight. She arranged a taxi for me in the morning, and had a breakfast wrapped up for me to take with me (since my taxi was at 4am). Her place is also easy to find from the metro station. The room was quiet and comfortable. Fabiana's daughter was also very helpful in translating for me when my Spanish failed.
All in all, I would highly recommend staying with Fabiana, and will stay again next time I'm in Madrid.