We had a second story 20 year old sliding door with a complex drain system that used pipes in our garage ceiling for the water that collected in the tracks. Four Seasons did a great job of extracting the old door and sealing over the Rube Goldberg drain system. The new Ply Gem door is a nice fit and the weather seals are much nicer than the old door. The trim work is very clean and the improved thermal qualities of the Ply Gem door can easily be felt. I will keep these folks on my short list next time I need a replacement like this.