The hospitality we received from Katerina and her husband was unparalleled. Transfers were arranged to and from the port / airport by Katerina, which was so convenient. Katerina gave so many local tips and answered our questions about where to go / what to do so quickly. Even when the door handle was stuck Katerina and her husband came to fix it. Super friendly people.
The apartment itself was lovely - the pictures really don't do it justice. It was clean and pretty spacious, with a large backyard and garden area. The bathroom looks pretty new and was also very clean. Bathroom shower curtain is too short tho. Note that the bedroom doesn't have AC but the AC in the living room will do a good job of cooling down the whole house if you leave the bedroom door open. Bed was nice and comfy. The sunrise and sunset views from the apartment are really nice.
Location of the apartment is great. It's away from the noisy tourist areas but at a convenient location. The Fira bus station (from which all buses to different parts of Santorini depart) is about a 10-15min walk away. There's a mini mart with basic food and sundry needs less than 5min walk away. Fira main square with shops etc is about 15min walk away.
You should definitely book this place!