I live in a 1920's bungalow in the Montrose area with beautiful original windows ... however, they are drafty. You can see the curtains move. Not any more. I stand by them on cold days now and cannot tell it's cold, which means I can leave my curtains open. One of my concerns was appearances, as I am all about not cheapening the historical look of my house. The Sun and Sound Window frames are so small, if I don't point them out to visitors, they don't realize I have them. I had two rooms put in as a trial and immediately called them back to do the rest of the rooms. Having these installed is much cheaper to what replacing the windows would entail in cost and time. The crew was efficient and fast. Took one afternoon each time to install the windows.