What a great location to spend a few days. Having experienced it ourselves, and also having spoken to others who spent time in Fira and Oia, Imerovigli is a brilliant place to stay. A short walk from Firostefani where we had lunch most days, there's also a bunch of good restaurants nearby, some supermarkets with reasonably priced snacks and drinks and it's a good place to launch for a nice walk down to Fira. The apartment was cleaned every day which I've never had before at an Airbnb, and we mixed our time between admiring the view from our balcony and socialising with others poolside.
Definitely recommend Hara's Houses to couples heading to Santorini... leave the kids behind!