i just ordered 17 AC vinyl replacment windows, double hung with 12 panes--AFTER reading these posts. Now I think I know why the company was offering a 15% discount at the time plus 10% from HD. Yeah, they are cheaper windows (mine averaged $100 per). But that's a fair deal in perspective. Consider: Some vendors wanted as much as $800 for the same window uninstalled. The house i'd be installing them in is not worth that kind of investment.