My rental unit in Toronto was missing one of the windows (one window slider frame). I called around and most of the companies told me that they do not do any repairs and they can only replace the whole window. Sobol was able to make the window frame and glass to fit the existing window and they even gave me an estimate from a picture I emailed them. Because I live in Niagara Falls, it was great that I didn't have to go up to Toronto to get the estimate! The work was done quickly and I am very happy with the result. I will use them again and I will recommend them to anyone.