The old patio door was drafty cold and extremely hard to open. The New door is warm and energy efficient. The company sent a sales person to measure and quote , promptly following a call to the company. About 7 -8 weeks later, an installer arrived with the new door . The installer was very professional and meticulous with the installation . He made certain that all sides were levelled, and precise to ensure the easy slide of the glass door and screen. The capping on the outside sets off the new door.installation. We are making plans to have other windows upgrade. Thanks so much !!