Overall we had a nice stay at Amalia's place in Fira. The location is super convenient, right in the center of town, close to the bus stop and a car rental, and Fira is a great central location for exploring Santorini.
The house itself was well appointed and comfortable, with great thoughtful touches such as robes and spa slippers, local wine, and coffee/espresso. Amalia was not in Santorini during our stay but had a friend check us in and provide help with anything we needed. He personally took us to the car rental agency where we got a great rate for our three day stay, and arranged for a taxi to pick us up at 4:00 AM on our day of departure so that we could get to our ferry on time.
We did have a few issues during our stay, such as the water in the hot tub being very low upon our arrival and two of the heaters in the house not functioning. I totally understand that we were visiting at a time that is not heavy with tourists, but for the price it would have been nice not to have to have different service people coming in and out to fix the issues during our stay.
The beds were decently comfortable and the wifi was reliable. The house is on a quiet residential street but a 2 minute walk takes you right into the heart of shopping an dining and even if the off season, there were lots of places to eat and drink, many open and serving food late into the night. We had a great time on this beautiful island.