I arrived quite late at night and only got to see Mariella for a moment and she left the mornig after so I wasn't able to get meet her, but her husband made me feel very welcome and gave me great advice on what to see in Ortigia and surroundings.
The apartmant was as described, cozy, clean and quiet. What they did mention is their two adorable dogs who kept me comany when I had to work!
The location is absolutely PERFECT! It takes about 2 minutes to get to the most beautiful square I have ever been to - Piazza Duomo.
I highly recommend it!