Alexandra's house has been an excellent deal for our group of friends. We were a group of 8 people (originally 7 but the owners were kind enough to let us a person! We had asked for the permission weeks before actually entering the house) and had no problem fitting in! The house is clean with a nice outdoor space where we spent most of our dinners. The location is reasonably close to the seashore and the city center, around 20 mins walking on a soft slope (sadly the street hs no actual sidewalk and the lights are scarce so be careful after the sunset!), and by public transport you can easily reach all the Santorini's point of interest!
It was a great stay for us!