I never did until one day I walked into Narcoosees and was told we didn't have a reservation, when i very well knew that i did, i mean, I had the confirmation number and all.
It was a simple mistake really. I had originally booked LTT for dinner but changed it to Narcoosees a few months later. Unfortuantely, the LTT was never canceled, so my Narcoosees ressie was canceled in the system at some point close to our trip.
I hate bugging CM's unecessarily, but after that, I learned that if I ever make a change to my schedule, I should call more than once to make sure that its been changed correctly in the system.