Nice peaceful location
The Aethrio hotel is a nice peaceful location in the middle of busy Oia. The hotel is well kept, the staff is very helpful and the room we had was huge. The bathrooms could use an upgrade but overall it was a wonderful location for exploring the town and visiting the rest of the island.
Go on the volcanoe tour. It is a great day to see the crater of the volcano and to do a bit of hiking. Make sure you take water with you as even in June the top can be very hot. The hot springs are not very hot, but a lot of fun to swim in.