Background: Wife's H1 expires in a couple of weeks. Needed EAD card. Had filed I-765 on sept 07 2005. Five months and no EAD card yet. Checked with INS 800 number. Found the card was at Missouri ( Lee's Summit ) service center. Since time was running out on the H1 B. Took an appointment at Detroit Office. For interim EAD. Here is a sequence of events for some one else who might need an interim EAD in Detroit MI.
On the 90th day, I make an appointment. The earliest day on infopass is 5 days later on Friday, so I make that appointment, and print out the sheet confirmation with the barcode.
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On Friday
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I went to the line at 10:00am for my 10:30 appointment. The guy at the door says you can't come in yet, come back 15 minutes later. That means even if you come really early before your appointment it is pointless. It is best to come 15 min before.