When the top pane of our garden window was broken by a hail storm, The Rock Glass & Mirror was recommended to us by the building supply store where we had bought the window. We called, and they made two visits: one to measure the glass and a second one to install the new pane once it had been pre-fabricated. Both times, they arrived right at the beginning of the period we were told to expect them. It's nice not to have to wait around for hours! The measurement only took a minute, the installation not much longer. Now our window is good as new and we are very satisfied.