If Aleksandr is not the best host I have encountered he is definitely top 5.
The level of care and commitment is on unprecedented scale. I’d expect that from 5star resort not Airbnb :)

Rooms are clean and spacious, kitchen well equipped. You get cleaning services on request, Mrs Nataila is there for you all day. Main pool is big and deep, small one perfect for kids or for chilling:)
Place is still developing and some things require small fix here and there but if you call Aleksandr, it will be fixed in no time.
Some beds are soft, some quite hard so if you have preference check if you have an option to choose.
You have 3 restaurants within 5mintes walk. 10 minutes and you are in marina. Best fried calamari in the neighbourhood:) and small but expensive mini market. If you want bigger shopping, Aleksandr will help you. 7minutes of drive.
In marina you can rent a boat, license free. I highly recommend this, however when it’s windy I’d not go without previous motorboat experience.
To sum up: we had a wonderful week and if we’d ever visit Santorini again, Aleksandr will be our host.