Margarita's place is beautiful, clean, quiet, and a great deal for Santorini. She is a very responsive and helpful host, and handled transport to and from the airport and port for me without any problems at all.
The one thing I'd say about this place – Finikia is not in one of the larger towns with lots of activity and a caldera view. If I were to visit again – especially alone – I would probably stay on that side, especially because the walk back to Margarita's place was a little isolated and dark.