What about when you go out to eat at a restaurant at home. You have the choice to make a reservation at the time you want (ie "my time") or simply show up and wait for a table. That's the point of MTD. It is for those that don't want to be stuck with only two seating times but want a variety of times to eat. If you are really flexible and want a table "when available", just show up. But if you want to pick a specific time (ie MY time), make a reservation. You can just "roll" in when you want - me, I prefer to have a reservation.