It was heart-breaking to even think about replacing the original, leaded-glass, wooden windows in our 1920s home—but it was even harder to justify the exorbitant heating oil costs not to mention the impact on the environment of so much wasted energy. When I discovered Indow Windows I realized I had found an elegant and affordable solution! The quiet and warmth was instantly noticeable—however the inserts were not! My friend bumped her head and hand into them, knowing the inserts were in the window but not able to see them. That’s how seamless the design is! I highly recommend this highly functional, innovative, reasonably priced and easy-to-use product. The customer service has also been incredible!