We ate there 3 times while we were just down there (twice to eat dinner & once for the kitchen sink). It seems to go in waves, but an early dinner might be your best bet. There is an arcade next door to wait while your buzzer goes off though
I have a picture of the kitchen sink if you are interested
Either right when they open for lunch (11"ish") or an early dinner as the above poster mentioned The dinner rush goes all night because guests swing by for ice cream after leaving the parks esp. after Illuminations ends!