This place is absolutely perfect for you if you wanting to spend time at the black beaches as well as spend time touring the site of Santorini. It isn't too far to walk to Emporia (though it is a long walk) and public transportation is easy to navigate (used Moovit app). We visited Thera(Fira) by bus one day and absolutely loved the Museum of Ancient Thera and the shopping in the area. We absolutely loved the island and Perissa was our favorite.
Irene made this place so much more special. She was extremely quick to respond to questions before our arrival and went above and beyond to accommodate us. She set up or transportation to and from the airport. She also offered amazing tips about what to go see while on the island. She was so sweet and genuine. We absolutely loved her puppy Rappy. He added quite the charm to the place.