It's a decent window. Similar to the Simonton line. However, with Simonton you are getting a well established manufacturer with a long history of quality products and great customer service. Those of us who have been around have witness too many "started by former employees" companies fail such as ForceV (Schuco) and Echo Windows (Kensington).
Wincore's sales pitch seems to be that it's just as good as a Simonton because it's former Simonton employees and then they lie about problems with Simonton's quality since they were purchased by Fortune Brands, which of course is ridiculous. I doubt anyone could point to any Fotune Brands products like Master Locks, Moen, Canadian Club etc. that have gone downhill since being aquired.