This is the perfect place (with views!) for Oia. Be warned: Oia means stairs, irrespective of where you stay.
Customer service: our contacts were Fanis and Mary, their service was perfect; prompt, friendly and helpful. We had a (good) complimentary bottle of wine on arrival. Quick and helpful reply when we had Qs. Both proficient in English.
Arrival: have owner arrange pickup at airport AND porter (stairs).
Apartment: is a tube with entrance at one end, bedroom at the other and kitchen/bath off to the side. It’s great, well appointed and comfortable. Has A/C.
Views: spectacular, from the patio outside entrance, where you have a table and 2 chairs.
Location/noise: perfect location, walking distance to everything in Oia and peaceful. There are masses of tourists walking around in Oia, but you’re far enough from them and there is no noise.
Groceries/shopping/pharmacy: very good with walking range.
COVID test: next to pharmacy, next to main church, 20 euro, results in an hour.
Beaches: volcanic island, pebble (not sand) beaches, none in Oia. There is a point where you can enter the water in Oia, ~1km from apt all down steep stairs. Going to the beach means driving.
Best time to visit: October-May. Summer means throngs and heat.