We had all of our windows (36) replaced Aug 2019. From the quote process all the way through the install, we were VERY pleased with the customer service, the overall experience and the product. Fast forward to February 2021. We got to see first hand how great the quality of these windows really are. Our power was out for 24+ hours during the winter storm. All we had for heat was a small wood burning fireplace in the den. The temperature in our house, while cold, never dropped below freezing even when the temps outside got down to 0. We truly believe this is almost all due to our Windows USA windows. Thank you Windows USA for making such a quality product!! Worth every penny!!