We are very happy. We bought the Indows for energy purposes and I'm sure they will show up over time. What has really surprised us--shocked us?--is how much quieter the house is. Although we live in a very rural area, the sound passing into the house from outside has been dramatic and immediate. That seems like an important distinction: noise reduction is immediate and energy savings are longer term. We live about 3000 miles from Portland, so we were very pleased by the safe arrival of our Indows. Whoever thought out their packing, deserves some sort of prize beyond our appreciation.