I set timers all the time for my fundraiser and charity events. Why? Because some tournaments would take WAY too long if we let everyone get to 21. Timers are a great way to keep games moving. Even setting a timer WAY over what a typical game would take to play can be beneficial. Timers just naturally make people pay attention and not screw around.
Timers are Dummy Timers, they DO NOT submit the game for you. It is a visual timer and players are to pay attention and submit when the timer has reached 0.00