F M installed 3 windows and a patio door Nov 22 2006. Returned within weeks to fix door lock by adjusting catch. Returned that spring and loosened catch further so now it stuck out even more. Door still wasn't locking by late fall so I called Nov 2007 and left a detailed message as instructed. Nobody returned call. Called again Feb 2008 and was told I would have to pay for a service call even though this was an on going problem. I now had a door that didn't lock, a screen that you had to close twice to fit into the pocket and plugs falling out of the frame. When I purchased with F M Industries I liked the quality of their product and they came highly recommended but I didn't feel I had the same experience. Update: We just wanted to add that once FM Industries were made aware in writing of the exact problem we were having with or patio door, they fixed it in a prompt and courteous manner. It was an easy repair that just took a little time and in no way reflected on the exceptional quality of their windows and doors. I would not hesitate to use their services again or recommend them to anyone. Sincerely, Bill in Brampton.