Asking whether a VW Polo VI 1.0 TSI OPF UNITED DSG (7-Gang) is a good family car, is not easy to answer from a technical point of view. The range of families requirements is wide, so this representation only considers the common aspects.
The VW Polo brings 5 seats with it which is basically good and sufficient for many families, but the car fluffs when it comes to the trunk - 1125 liters of volume might not be sufficient for most families. There are no Isofix brackets installed. These could be used to secure child seats easily and safely, if a little more space is needed in the interior, the rear seat can be folded down.