We are in the market for some replacement windows at our home in NE Seattle. We contacted Keystone, and scheduled an appt for a Monday evening in February. When no one showed up at the scheduled time, we were initially patient. It was President's Day afterall, so we were willing to forgive a scheduling error. The next day, we contacted them and rescheduled the appt for the following Monday evening. Once again, we waited at home, and no one from Keystone showed up, nor did they call that nite or the next day. We've still heard nothing from them.
They have some very positive reviews on their website, but all we can say about them is don't waste your time. Scheduling an appt is no guarantee that they will actually come out, and their lack of follow-up after missed appointments is inexcusable.
Needless to say, we are looking elsewhere for new windows.