The instruction video was invaluable in understanding how to measure precisely, and which configuration to choose. The online ordering process was streamlined, and the product arrived on time and in perfect condition. Installation was very easy, and we are thrilled with the quality of the shutters. We have had a lot of compliments, it has made the house look very classy. I am more than happy with them, they allow for perfect light and heat control of our very large floor to ceiling windows. We highly recommend this product!