We received our Indow Window inserts and got them installed with no issues, installation was a breeze. We immediately noticed a difference in our home temperature and are so happy our purchase. We were very happy with the customer service especially guiding us through the process during our project allowing us to purchase half our windows first and then the other half at a later date. The inserts are very easy to pop in and remove, we noticed right away that no air was coming in and the touch to the windows is not very cold like it is on glass windows. We are very happy with the product service and delivery.