Used Annapolis Yellow & Checker last weekend when i flew in for a meeting at the Naval Academy. I had arranged with them the day before to be met at the airport at precisely 8am. I arrived at 750 and called as to status. The company told me the cab was enroute and would be there shortly. It showed up at 815 causing me to be late for my meeting. The driver confirmed my suspicion that she had not been dispatched until i called that morning to check on status. Not ideal - I would caution potential users to be careful about this company especially for anything time sensitive.