Pathetic. Maintenance delayed our 8:20 am flight 2 hours. Then added another hour, then another. Now it won't arrive Into Denver until after 5 pm. They directed us to a customer service area with a total of 3 agents. (2 left for a break) The line takes at least an hour and then we have to go stand in it again when the plane is further delayed to correct our connections. Now because we have stood in it for so long we have missed any chance of connecting. United, if this is your idea of customer service, YOU ARE SADLY MISTAKEN!!!!