If you rent a car finikia is the perfect place to stay. There are 2 public lots available to you and it's convenient to get around. From finikia to oia is a short walk and is rather pleasant.
The apartment is great exactly as described. Daniele even leaves some snacks in the fridge for you. There are 2 restaurants within a 3 min walk and normal priced grocery stores all around. Watching the sunset from the hot tub or nearby restaurant is a treat.