We stayed for 1 month. We didn't know much about the area before we came but it turned out to be perfect. There are plenty of hills, hikes and runs to do - we did not finish all of them even though we went out every day. All the mountains are no more than 20 minutes away, and the views are SPECTACULAR!!! Dikti at 2148m is easy on a good day.
Argyris' place was perfect. It was warm, clean, even in November. His uncle dropped in every now and then and was also very helpful and friendly. There are plenty of great options to buy fresh produce and many tavernas to go to - particularly Mafia's in Tzermiado.