Last summer (2014) we had Gill make us 6 patio doors and a large window. We had all of the doors installed around our porch, which effectively gave us a sun room that we could enjoy year round, and allows us to control the air flow through the porch area regardless of the wind direction or force, which is a key factor here in Wyoming! We have found these doors to be flawlessly constructed and absolutely windproof. These were important considerations since we like to sit out on the porch and watch nature's fury and her beauty during the winter and summer months. We could have gotten less expensive patio doors at one of the giant home improvement chains, but we could not have gotten the same degree of quality construction or personal attention to our needs. Highly recommend Gill for custom doors and windows that are 2nd to none!