I just spent a week at Kalipso house and it was fantastic.
First and foremost what made my stay extra special was Maria's uncle and his wife, Giannis and Adrianna. I'd read the reviews and everyone said they were wonderful, but I really had no idea until I experienced it for myself. They took me to and from the airport, they gave me lots of tips and recommendations. They gave me a tour of some special places in Kamari and also drove me between the towns one day. They even surprised me with Greek home-baked treats 2x and one day even insisted I take some of the extra food they had from lunch (stuffed tomatoes!) It was delicious. To be honest, they made me feel like I was part of their family for a week and I will definitely go back one day to see them and Santorini.
I describe the apartment below but the real highlight was meeting such fantastic people who made my trip to Santorini so memorable!

Location highlights:
- Kamari is a less touristy area of Santorini (compared to Oia and Fira). This suited me perfectly as I had wanted a more local/authentic experience.
- The apartment was only a 5 minute walk to the bus stop (KTEL buses). Cheap, easy, safe and comfortable. Helpful hint: You pay for your fare on the bus itself. It isn't clearly marked anywhere. Also you can get change of you don't have exact fare.
- The apartment is only a 2-3 min walk to the beach and doesn't have lots of steps. Very walkable for someone who cannot handle lots of steps.
The apartment highlights:
- views are exactly as shown in the photos Maria posted (spectacular).
- extremely clean
- had everything I needed to cook basic meals.
- great shower, with proper temperature range from hot to cold
- quiet
- strong wifi. I streamed Netflix through the week and never had an issue
- safe, as a female travelling solo, it felt very safe. Working locks on doors and windows.