Fira and Oia town in August are absolutely crazy. Noisy, jam packed with hundreds of people in tiny lane ways when it's stinking hot. Our Olive tree suite was an oasis, a haven to return to after the madness of the tiny little streets. The room is super modern, perfectly clean with icy Cold air conditioning and very quiet away from the craziness at most times of the day. The shutters also keep the room dark.
Anotinis is a great communicator and answered all our questions with great diplomacy and care. I would not hesitate to recommend Olive tree suites for your stay in Santorini.