Originally Posted by
dchristiva
I guess the disadvantage is pretty much the same - you don't get to talk to anyone, so there's no chance of "sweet talking" your way into a table.
Actually, if there are no OT reservations available, you can always call. Not every restaurant has last-table availability on OT, or leaves a bit of cushion for computer error, walk-ins, hotel concierge (and other special) favors, etc.