Purchased 8 replacement windows less than 6 years ago. Over the last 3 years at least one of the windows has suffered a broken seal and mold is growing in between the dual panes of glass. Great Lakes does send out replacement glass but I'm responsible for the cost of getting the new glass installed in the vinyl frame. They don't send a complete, ready to install pane. 3 of 8 windows (so far) is a horrible failure rate and I just hope to keep other prospective window buyers from purchasing the same low quality product I'm now stuck with. read full review »