We stayed for three and a half weeks in november (working holidays) and had a very fine stay. The internet connection was excellent, the apartment very clean (the service of a cleaning lady was included), and our hosts were lovely people reacting very fast to some questions we had.
We also recommend the month of november to stay in Chania: there were very few tourists, but we could still have baths in the sea and had entire beaches for ourselves (and also the busses that took us there).
Very nice location!