What a view! Close to everything in oia but you'll definitely want the porter to help if you're traveling with substantial luggage (as the stairs down to the studio are pretty steep).
Maria was such a great resource and functioned as a personal concierge - she was truly great!
Only small complain was the intermittent wifi (but you're in Santorini, so it's hard to be too bothered by it).
Would definitely recommend!