If you book at Katia's place, you are in for a great experience.
I contacted Katia with a request to book and got a positive reply within hours. Several days before the arrival, she shared tips on Santorini and clarified the arrival details. We rented a car from the airport and drove to Oia (about 30 min), upon arrival Katia's assistant met us to help with parking the car (there's a public parking 1 minute away from the house, can be tricky in the evening, but we always managed to find a spot there or next to the bus parking area down the street). The house was clean and beautiful, with a view of the sea and tasteful decoration. We even found a bowl with coffee capsules next to the coffee machine, such a sweet touch. The kitchen is fully equipped, we also found a sponge and dishwashing liquid, 2 bottles of water in the fridge and some ice in the freezer. There' s a good grocery store right outside the house, we picked up all the necessary there.
The house is just a few minutes walk away from the main street of Oia: perfect for going out, yet sleeping in a quiet place. The bus station is a 1-minute walk away if you don't rent a car.
The house is spacious enough to accommodate 5 people (1 DBL room upstairs, 1 TWIN and 1 SGL downstairs). Bathrooms with showers: 1 upstairs and 1 downstairs. There is a staircase that leads to the room upstairs which might not be suitable for young kids or elderly, however, it was perfect for us. My husband and I felt like we had our private space.
Beautiful balconies! Unfortunately, we didn't use them much, it was a bit too windy.
My husband was expecting a letter delivery to Santorini, and Katia was very kind to help us with the delivery address and tips on how to get it done. She later sent me some shop names that sell art and ceramics - something we had never discussed, but what was written in my profile. I was so surprised and delighted :)
We had an early morning departure, however, Katia's assistant came to collect the keys on time, at 6 am, and even helped us with the luggage.
Overall, it was a wonderful stay! I would gladly come back and stay at Katia's again!
* A tip from us: for the best grilled squid, try Petrosia restaurant. We went back there 4 times in 5 days! It's delicious, tender and costs only 16 euro. The staff was incredibly attentive and welcoming, they even presented us with a bottle of wine on our last dinner as a takeaway​ gift of gratitude.