First off - My appointment was scheduled between 1-5PM in advance, I was on a conference call when the technician called to confirm my appointment and "prevent driving over". Apparently if you do not answer the call at first attempt the appointment is cancelled. This occurred at 1:05PM, the call center person attempted to contact the technician and he doesn't answer with no repercussions to him. However, they can't do anything except reschedule your appointment. What an inconvenience!