We stayed at Mansion Sophia for five nights the first week of October and had an incredible stay. The pool and terrace were wonderful for enjoying the 80 degree weather, and we took advantage of the kitchen to cook lunch and dinner a few days. The villa is spacious, and the concierge, maid, gardener, and pool cleaner could not have been nicer.
Megalochori is a charming village. After visiting Fira, Oia, Pyrgos, and Kamari, we were so happy we stayed there. Three great restaurants are located around the village square, and they are no more than a minute or two walk from the villa. Numerous vineyards are nearby as well. Megalochori was also a great base from which to explore the island. The villa is very near parking which is convenient if you rent a car (like we did), and Santorini Heritage provided lots of great suggestions for things to do on the island.
All in all, we could not have asked for a better vacation.