Great place to stay, Eva is one of the best Airbnb hosts around. It's a great experience eating breakfast in the peace and quiet away from the normal busyness of Santorini.
The Airbnb is located off the beaten track a bit, away from the busy Thera and Oia town centres. You can hike up the hill to Imerovigli and then walk down to Thera or hike a slightly longer way to Oia -- both ways give you stunning views and great food options.
Eva helped us book some wine and boat tours of Santorini, which were both great. She was always ready to help if we needed anything.
Our only (very minor) criticism is that the wifi indoors was a little spotty, probably due to the very thick stone walls. Go outside if you need to make any Skype calls :)