Naftilos House was perfect! The apartment has a small kitchen with all of the basics, a large bathroom, and very comfortable bed. The terrace has views out to the water and the island Ios and felt very private. Finikia itself is very peaceful and quiet and only 10 minutes walk to Oia. We stayed mid October so there were no tourists around as they all seemed to stay in Oia.
Margarita was great in communicating as soon as we had booked and was always contactable by phone or email if need. We met with her cousin Pothiti who checked us in and provided daily servicing if we wanted. She also arranged someone to carry our bags to the apartment, and transfers to and from the port.
We often had cats come and sit on the terrace which was a shock at first (as it was our first time in the Greek Islands) but they were harmless and just wanted some company and sun. I'd recommend being aware that cats are around and remember to shut the windows when you leave the apartment as the cats are in search of food.
We had a great stay and I would definitely recommend Naftilos House to anyone.