We staying in Zefi's place for a weekend during September.
I saw the ratings and in reality the situation was even better.
Zefi's mother was very kind on picking us up from the port, take us to the place and provide info about the island.
The room was very clean and everything was organized, with maps, important phone numbers, taxi info plus some local treats!
The view from the place is amazing, far more good than in the pictures.
Even if it requires a little bit of walking (10') to reach the port (in case you don't have a vehicle) for me was not something to worry.
Syros is a very good option for a short stay as it's a small island. In case I'm going to visit in the future, Zefi's place will be again my first option and for sure, I'll recommend it.