Jackie and Nikos were fabulous hosts, even when our plane was over 2 hours late, they were at the airport ready to transfer us late at night. Jackie came back to see us the next day to help get our bearings on Santorini and she even booked a boat cruise for us which was great.
The studio is small but with the uninterrupted view of the caldera it is worth it and when you are there it is hard to draw yourself away from the balcony and the view. The small kitchenette is adequate to cook a basic meal (for times when you just can't climb those stairs again!)
The studio is only a short climb to the bus terminal for access to Fira and all other parts of the island.
I would thoroughly recommend both this accommodation and the wonderful hosts for your stay in Oia.