They are the HD lower end brand. I personally would probably not buy them for my locale, although they are sold here in Mn. These are a decent low end window, and the company would probably agree with that, or say they were mid range.
I have heard a few people comment about disliking them, but can't give you any direct quotes.
Jim, you get what you pay for... If you want and can afford a Cadillac, you buy one. If you want and can afford a Pinto, you buy one. My honest recommendation is to step up to a better quality window, Pella, Marvin, Kolbe and Kolbe, Weathershield, and that other Minnesota company are all good ones.