Last week, we had Brock replace several 1st and 2nd floor windows in our home. they are single hung window, patio door, and two slider windows. all windows are brick to brick, patio door is retrofit. Brock also put new limestone for bottom of patio door, since Brian the sales rep notice some issue with the brick under the door. We were so happy with their work, i think we will have them back in the future to do our other windows. we were very impressed with their friendly and efficient installers. In just several hours, less than half a day, three windows and one patio door were replaced, and they look fantastic! suggestion: first decide whether to do brick to brick or retrofit, and then get quotes. otherwise you will end up with very cheap quote (retrofit), and very expensive quote (brick to brick) Thank you Brock!