Nothing at all. I would gladly return.
I arrived by boat and asked the hotel staff to arrange a transfer, which was good, because it would be difficult to get to the hotel by myself. I loved the hotel. The staff was very nice, helpful and thoughtful. I had a wonderful chat with Laura and she booked a catamaran ride for the following day, which I also recommend. Breakfast was served in the room, I just had to call the reception and in about 10 minutes Laura would deliver it. I booked a room with a jacuzzi but the weather was cold and the water did not get hot, but yet I got in and had a cold bath. There are restaurants, shops and markets near the hotel, I just had to walk around. The sunset in Santorini is indescribable, and the best points to admire it are in Oia, that's why I am glad I chose Oia to stay and Onar Villas. There is a bus stop in front of the hotel and it took me abou 25 minutes to get to Thira and walk around. The day I left I also had a transfer arranged and the van took me to the port in about 20 minutes. Onar Villas, you are the best.