Nothing special about their window except for the way they present it to homeowners. Thickest sales training manual for sales reps in the industry. You need to get some more estimates. I have a job starting in 2-weeks right down the street from where their windows are manufactured. I've been wanting to stop in to take a closer look at their latest offerings but haven't had time. I'm curious to see what makes their $1,200 a window so special.
Maybe they pay their installers 3-4 times the industry average to install them!