It depends on the game, your strategy, and your machine. We have never had a shifting tranny. However in 2002 we wish we had.
Team 25, in 2002, comes to mind. They would fly out to the goals, grab them and then shift gears.
In 2003 it would have been nice for certain situations, but certainly not needed. We compensated for single speed with very high friction tires. We feel that our tires helped us win many matches.
For 2004 I really don't see any use for a shifting tranny at all.
But again, it depends on YOUR situation. Although, it is very cool to have one.
