The apartment and the views are even better in person than in the photos. We would 100% recommend staying in any of Nicoletta's apartments in Ammoudi Bay if you are visiting Santorini. It was very quiet and peaceful in the mornings and evenings as there aren't many tourists staying in this area, but it's still very accessible. Her daughters met us - we were arriving very late, but they had also arranged transport from airport - and we were in contact throughout the weekend - making sailing tour reservations, recommendations, arranging checkout, luggage storage, etc. We hadn't planned much of what we would do day to day but all of their recommendations were excellent and we ended up having an amazing holiday.
The only thing I would keep in mind before booking is that the walk up to Oia could be difficult for some. We are quite active so we didn't mind the exercise but many people come up and down in tour buses, rental cars, taxis, etc. So, it may include some extra transport costs if you're not up for the climb.