I was pleased they came back and gave me a discount to redo it after 2 years. They advised the appointment was between 8-9 am. It could take an hour. I should have our cars out of the driveway by 7:30. I called at 11:00 and inquired where they were. Apparently the schedule had been changed and now it was going to be in the afternoon. I called around 3:00 as no one had showed and no call. I was advised they would be here. They showed up 7:00 pm and they were finished in approximately 35 minutes.