Traveled with children of 2, 7 and 10.
Very safe for our youngest child: no traffic, nice garden with pool with a fence around.
As you share the garden/pool with other families it was easy for our daughter to find new friends.
Beware that the villa is rather humid at the beginning of season (march/april).
Close to 4 different beaches and a Little park with playground.
Most practical to have a car to go to Chania centre (15 min).
Try Hellas bikes if you like to cycle (Agia Marina). A very interesting downhill cyckling trip.