I have to say we were disappointed at the conditions of the place, some wall paint was cracking and stucco falling apart. The conditions of the bathrooms were bad too, the fixtures were all rusted and the light bulbs were out.
The sofa bed was not in good condition either, it was over a rolling bed and falling back.
We stayed for 7 days in July, the A/C broke on the 2nd night and it was never fixed. We had very uncomfortable days with the summer heat.
The patio, even though it has an amazing view, was in poor conditions, the umbrella was broken so we had to improvise to be able to enjoy the view during the day.
The location is great, very convenient. Yes, lots of stairs, but someone helps you with the luggage and he was very nice.

We loved our time in Santorini though!!