I worked with a salesman (Jim Nemmer) who is no longer with them (he moved to another state). The process was very straightforward and painless. The workmanship was excellent and fast. I ordered very expensive Marvin windows, and Keystone worked with a local craftsman to apply an after-market leaded-glass look. Excellent job. I would work with them again any day.
Pros: fast, high quality, neat
Cons: expensive
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