Demonstrably lying rip-off merchants. Do not deal with these people. Their double-glazed windows do not fit, are far smaller than what they replace and filled with packing (badly) to try and cover it up.

Company treats its customers with utter contempt and never returns calls when they say they will.

Any issues with their work will be dragged out with months and you'll be forced to go to Fair Trading to try and get them to rectify it.

Approximate cost: $12000