Ok, worked for me too! I never got through on the phone. Kind of weird though -- Using the website, I got two lunch reservations (for different days) even though I never got an actual confirmation screen (I made it to the last step, but when I clicked the final "next" button it just kept telling me there was an error). Only got an email confirmation for one. Both reservations are showing up in MDE, though, with confirmation numbers!
I tried dozens of times starting at 6am to get reservations online, and reached that same error screen on the last step each time. I have no idea why these particular two went through. I wouldn't have known they went through except that I checked my email and was surprised to see one confirmation. Then I checked my MDE account, and two reservations/confirmations were there!
I am going to print/screenshot all this like crazy...